Revelation 13:11-18 says all people will be required to worship the image of the beast and to accept “a stamped image on their right hands or their foreheads, so that no one could buy or sell except one who had the stamped image of the beast’s name or the number that stood for its name. Wisdom is needed here; one who understands can calculate the number of the beast, for it is a number that stands for a person. His number is six hundred and sixty-six.”
“A number that stands for a person”
“Gematria” is an Assyro-Babylonian system of numerology later adopted by Jews which assigns numerical value to each letter of the alphabet, then looks for significance in the sums. Adding all the numerical values of the letters in a person’s name produces a number that stands for the person. Simple English gematria assigns A = 1, B = 2, and so on. Spaces = 0. In this system, Chrissy the Hyphenated = 240. I found a gematria calculator on-line @ http://www.gematrix.org/?word=what%20is%20gematria that gave 1424 and 1400 as solutions for Chrissy the Hyphenated, but I have no idea why. Many possible combinations of letters will add up to 666. There’s even a list of possibles @ http://www.gematrix.org/?word=666. They include “Thomas Cruise” and “Star Spangled Banner.”
Some of the oldest manuscript fragments of Revelation 13 say 616 rather than 666. Some scholars favor one; some say it’s the other. Personally, I think it’s both.