664455704725136 has 10 divisors (see below), whose sum is σ = 1287382927904982. Its totient is φ = 332227852362560.

The previous prime is 664455704725093. The next prime is 664455704725151. The reversal of 664455704725136 is 631527407554466.

It can be written as a sum of positive squares in only one way, i.e., 514484918707600 + 149970786017536 = 22682260^2 + 12246256^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20764240772645 + ... + 20764240772676.

Almost surely, 2^{664455704725136} is an apocalyptic number.

It is an amenable number.

664455704725136 is a deficient number, since it is larger than the sum of its proper divisors (622927223179846).

664455704725136 is a wasteful number, since it uses less digits than its factorization.

664455704725136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41528481545329 (or 41528481545323 counting only the distinct ones).

The product of its (nonzero) digits is 508032000, while the sum is 65.

The spelling of 664455704725136 in words is "six hundred sixty-four trillion, four hundred fifty-five billion, seven hundred four million, seven hundred twenty-five thousand, one hundred thirty-six".