The triple six, 666, comes into play as the magic number of Triple Aphrodite (or Ishtar) in the guise of the Fates. After Solomon met the Queen of Sheba he acquired 666 talents of gold (I Kings, 10:14). The way it comes into play for the Egyptians is simple. The Egyptians considered 3, 6, and 7 most sacred numbers. Three represented the Triple Goddess, six meant her union with God; seven meant the Seven Harthos, seven planetary spheres, seven-gated holy city, seven-year reigns of kings, and so forth. Egyptians were obsessed with the conviction that the total number of all deities had to be 37, because of the number's magical properties. This was because it combined the sacred numbers of 3 and 7; and, 37 multiplied by any multiple of 3 gave a triple digit or "trinity": 111, 222, 333, 444, 555, etc. The miraculous number 666 is the product of 3 X 6 X 37.
Barbara Walker, in "The I Ching of the Goddess", talks about the hexagram, and it's implications to Witchcraft:
The word hexagram does not really mean an arrangement of parallel horizontal lines {as in the I Ching}. It means a geometric figure composed of two interlocking triangles: the same figure now generally accepted as a symbol of Judaism and even erroneously called the Star of David, or sometimes Solomon's Seal. In fact this figure was unknown in Jewish tradition until the twelfth century A.D., when it appeared in the symbolism of the Cabala, apparently having traveled to the mystics of Spanish Jewry from Tantric sages in the Far East, where it was known as the Sri Yantra or Great Yantra. It was not officially adopted as a Jewish emblem until five hundred years later, in the seventeenth century.
Medieval Jewish cabalists used the hexagram in much the same way as their Tantric forerunners, to represent divinity in terms of a union of the sexes. They even claimed that the hexagram first appeared inside the Ark of the Covenant, along with the tablets of the laws, and that it stood for male and female deities in perpetual sexual intercourse, the same meaning it bore in India. To cabalists, the union of God and his Shekina (the Female Principle) was modeled on the union of Shiva and the cosmic Goddess, Kali-Shakti, his mother-sister-bride, who also devoured him and gave him eternal cyclic rebirth.
Cabalists envisioned the Shekina in much the same way as early Gnostic sages envisioned Jehovah's spouse Sophia, who embodied his wisdom and the essential spirit that enabled him to function at all. She too was a Westernized version of the Tantric Shakti. Cabalists claimed that all the world's evil arose from God's separation from this female principle and the purpose of a true sage was to put God and his empowering female spirit back together. The usual route toward this end was sex magic, also designed according to the Tantric model.
From Barbara G. Walker, "The Woman's Encyclopedia of Myths and Secrets":
The familiar design of two interlocked triangles is generally supposed to have represented the Jewish faith since the time of David, or Solomon; therefore this hexagram is known as Magen David (Shield of David), or the Star of David, or Solomon's Seal. Actually, the hexagram had nothing to do with either David or Solomon. It was not mentioned in Jewish literature until the 12th century A.D., and was not adopted as a Jewish emblem until the 17th century.
The real history of the hexagram began with Tantric Hinduism, where it represented union of the sexes. ...
"The downward-pointing triangle is a female symbol corresponding to the yoni; it is called 'shakti.' The upward-pointing triangle is the male, the lingam, and is called 'the fire' (vahni)." {This quote comes from Heinrich Zimmer, "Myths and Symbols in Indian Art and Civilization", p. 147} ....
From the Tantric image of the sexual hexagram arose a Jewish system of sex worship connected with the medieval Cabala, and a rabbinical tradition that "a picture is supposed to be placed in the ark of the covenant alongside of the tables of the laws, which shows a man and a woman in intimate embrace, in the form of a hexagram."
Outside of these conjectures, we don't have to look too far to find the obvious tales of Egyptian significance in the Book of Revelation. Just as Sumerian mythology has something bearing forth the future apocolypsis of the World, so does Revelation 12:1-4:
"Next appeared a great portent in heaven, a woman robed with the sun, beneath her feet the moon, and on her head a crown of twleve stars. She was pregnant, and in the anguish of her labour she cried out to be delivered. Then a second portent appeared in heaven: a great red dragon with seven heads and ten horns; on his heads were seven diadems, and with his tail he swept down a third of the stars in the sky and flung them to the earth."
The pregnant woman in the sky is quite clearly Sirius, and this is a Christian rendition of the ancient Egyptian Isis myth. The moon is at her feet, implying that the scene is being observed upside-down, with the ecliptic below Sirius. This might imply the retrograde 'birth' of the Son celestially. The 12 stars in the crown are the lesser stars of the constellation Canis Major. Instead of Horus, we have Seth. It's no wonder this cosmic Christ was so destructive!
It could also be that in the Hebrew/Christian mind, as explained by Barclay, W. "Revelation 13, Great Themes of the N.T"
"Another variant is 606, which would be the sum of Gaios Kaisar, known as Caligula. Christian readers would have noticed the contrast between the number of the beast, 666, and the number of Jesus, 888 (the sum of the Greek letters Jesous). In 888 could be seen superabundant perfection, the three-fold 7+1. On the other hand 666 indicates the three-fold failure to reach perfection, 7-1. This showed how precarious and how doomed to failure the reign of the beast must be."
That is to say that John identified the pagan Gods with 666, and Jesus with 888, and this was a failure by the Beast to reach the heights of Jesus. It's also interesting to note how incorrect the grammar is. No one would write "666" in small letters in Greek, but that's what happened. In the Bible, 666 should be written the second way, not the first. The major meaning the writings of six-six-six in the fashion of the writer is to emphasize all of them having "hex" in them.
It shows this
: instead of
I think that this shows the writer was emphasizing the pagan elements of the 666 far more than the attachment to any one specific object.