More on 666

$latex 666 = 1^{6} - 2^{6} + 3^{6}$

$latex 666 = 6 +6 +6 +6^{3}+ 6^{3}+6^{3}$

$latex 666 = 2^{2}+ 3^{2}+ 5^{2}+ 7^{2}+ 11^{2}+ 13^{2}+ 17^{2}$

$latex \phi(666) = 666 $
where
$latex \phi(n) = \text{number of integers less than n and co-prime with n }$