The belief that 666 is the number of the beast is based a statement made in the Book of Revelation. It was discovered in 2005 that this statement had been translated incorrectly. Anyone believing in this type of thing should now think that 616 is the relevant figure, since this is what the Bible (really) says.
This word cropped up on tonight's BBC4 edition of brainiac panel show "QI". Also, it turns out that the number of the beast is, in fact, 616. You lives, you learns.
If you're moving into a house with a woman and two small children, I think you'll find you're "better off" getting out of there for fifty hours a week at work. Hope this helps.