666661160600 has 24 divisors (see below), whose sum is σ = 1549987198860. Its totient is φ = 266664464160.

The previous prime is 666661160567. The next prime is 666661160617. The reversal of 666661160600 is 6061166666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1666652702 + ... + 1666653101.

Almost surely, 2^666661160600 is an apocalyptic number.

It is an amenable number.

666661160600 is an abundant number, since it is smaller than the sum of its proper divisors (883326038260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666661160600 is a wasteful number, since it uses less digits than its factorization.

666661160600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333305819 (or 3333305810 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 666661160600 in words is "six hundred sixty-six billion, six hundred sixty-one million, one hundred sixty thousand, six hundred".