664456632632476 has 24 divisors (see below), whose sum is σ = 1177614949219520. Its totient is φ = 327995910470592.

The previous prime is 664456632632407. The next prime is 664456632632489. The reversal of 664456632632476 is 674236236654466.

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, 82639875 + ... + 90323098.

Almost surely, 2^{664456632632476} is an apocalyptic number.

It is an amenable number.

664456632632476 is a deficient number, since it is larger than the sum of its proper divisors (513158316587044).

664456632632476 is a wasteful number, since it uses less digits than its factorization.

664456632632476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172975213 (or 172975211 counting only the distinct ones).

The product of its digits is 3762339840, while the sum is 70.

The spelling of 664456632632476 in words is "six hundred sixty-four trillion, four hundred fifty-six billion, six hundred thirty-two million, six hundred thirty-two thousand, four hundred seventy-six".