Appearances of the number six-hundred sixty-six
In order to show that the book of Revelation was inspired, Ireneaus (120-202 AD), a early church apologist, noted that he had consulted the 'most approved and ancient copies' of Revelation for verification of 666.
How is the number 666 related to wealth?
King Solomon, after assuming the throne of Israel upon his father David's death, soon became wealthy. Although money streamed to him due to the heavy taxation of the Israelites (see 1Kings 4:24), it was the gold that came to him through a variety of other ways that made him the richest man alive. Every year he received a total of 666 talents of gold (1Kings 10:14 - 15), a figured confirmed by the first century historian Josephus (Antiquities (History) of the Jews, Book 8, Chapter 7). The value of these riches today, assuming $1,500 per troy ounce of gold, would exceed two BILLION U.S. dollars a year!
Additional information on the Biblical Meaning of 666
Three people in Scripture stand out as special adversaries of God and his people. Each, in one way or another, has the mark of 666.
GOLIATH, the giant for fought a very young king David, had a height of 6 cubits, had 6 pieces of armor, and his spear's head weighed 600 shekels of iron (1Samuel 17:4 - 7). NEBUCHADNEZZAR, the great King of Babylon, set up a "golden image" in the plain of Dura. He commanded all who he ruled over to worship it or else be thrown into a furnace of fire. The idol was 60 cubits high and 6 cubits wide (Daniel 3:1). The worship was to occur when six distinct musical instruments (cornet, dulcimer, flute, harp, psaltery, sackbut) were played. The last special adversary is ANTICHRIST, whose name numbers to 666 (Revelation 13:18).