70656664 has 32 divisors (see below), whose sum is σ = 143201520. Its totient is φ = 32489856.

The previous prime is 70656647. The next prime is 70656679. The reversal of 70656664 is 46665607.

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, 30822 + ... + 33034.

Almost surely, 2^70656664 is an apocalyptic number.

It is an amenable number.

70656664 is an abundant number, since it is smaller than the sum of its proper divisors (72544856).

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

70656664 is a wasteful number, since it uses less digits than its factorization.

70656664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539 (or 2535 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 70656664 is about 8405.7518402580. The cubic root of 70656664 is about 413.4132352179.

The spelling of 70656664 in words is "seventy million, six hundred fifty-six thousand, six hundred sixty-four".