"In fact, back then it would have been written χξϛ/χιϛ (chi - xi - sigma / chi - iota - sigma) in Greek and the guy who wrote Revelation would totally not get the stuff about three sixes in a row."

What does this mean?

It doesn't really mean anything that the page number of the "last page in the chapter devoted to this" in War and Peace is 666. Unless this is in the original Russian version, I doubt Tolstoy would have meant it to be so. So I'm deleting the example.