668536604 has 12 divisors (see below), whose sum is σ = 1170854328. Its totient is φ = 334006800.

The previous prime is 668536597. The next prime is 668536613. The reversal of 668536604 is 406635866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59567 + ... + 69894.

It is an arithmetic number, because the mean of its divisors is an integer number (97571194).

Almost surely, 2^668536604 is an apocalyptic number.

It is an amenable number.

668536604 is a deficient number, since it is larger than the sum of its proper divisors (502317724).

668536604 is a wasteful number, since it uses less digits than its factorization.

668536604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130756 (or 130754 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 668536604 is about 25856.0747987779. The cubic root of 668536604 is about 874.3964726317.

The spelling of 668536604 in words is "six hundred sixty-eight million, five hundred thirty-six thousand, six hundred four".