TYB!
Q is 17th digit
there are 26 total
so Q is just under 2/3 of the way through the alphabet: 17/26 = 0.653846154
that's really close to a "666"
would 18 be closer?
18/26 = 0.692307692
so, no; 17 is as close, letter-wise, as one can get to 2/3 of the way through which is 0.666.
not sure why this jumped out at me; hope it's helpful to some equation!
God bless in Jesus name.