664026604 has 12 divisors (see below), whose sum is σ = 1166183928. Its totient is φ = 330831200.

The previous prime is 664026593. The next prime is 664026619. The reversal of 664026604 is 406620466.

It is a self number, because there is not a number n which added to its sum of digits gives 664026604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294262 + ... + 296509.

It is an arithmetic number, because the mean of its divisors is an integer number (97181994).

Almost surely, 2^664026604 is an apocalyptic number.

It is an amenable number.

664026604 is a deficient number, since it is larger than the sum of its proper divisors (502157324).

664026604 is a wasteful number, since it uses less digits than its factorization.

664026604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591056 (or 591054 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 664026604 is about 25768.7136659943. The cubic root of 664026604 is about 872.4257855940.

The spelling of 664026604 in words is "six hundred sixty-four million, twenty-six thousand, six hundred four".