666510665116 has 24 divisors (see below), whose sum is σ = 1204380176384. Its totient is φ = 322408488240.

The previous prime is 666510665089. The next prime is 666510665141. The reversal of 666510665116 is 611566015666.

666510665116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 666510665116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389400 + ... + 1218463.

Almost surely, 2^666510665116 is an apocalyptic number.

It is an amenable number.

666510665116 is a deficient number, since it is larger than the sum of its proper divisors (537869511268).

666510665116 is a wasteful number, since it uses less digits than its factorization.

666510665116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611241 (or 1611239 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 666510665116 in words is "six hundred sixty-six billion, five hundred ten million, six hundred sixty-five thousand, one hundred sixteen".