6 is the number least chosen.
6 is the Number of Evil in the pseudo-Christian
Book of Revelation
(or, Apocalypse of John of Patmos)
in which one of the two Great Beasts -
the nameless Beast from the Sea
- bears the Mark (a brand ?) which is the uncomputed
number Six Hundred, Sixty and Six - not DCLXVI, but
though, textually, this can be disputed....