The number of Wiccans, their official symbol (the pentacle) having 5 points, 5 letter "A"s, and 5 lines (minus the circle). This is in contrast to 666 and 777. 111 is 1/5 of 555, 1/6 of 666, and 1/7 of 777. Also can be pressed in a chat room if you're into that sort of thing.
Did I remember to mention that there's 5 elements too? Earth, Air, Water, Fire, and Spirit.
A Witch's sacred number is 555, a Satanist's 666, and a Christian's number would be 777.
Press 555 if you're Pagan.