70815664 has 10 divisors (see below), whose sum is σ = 137205380. Its totient is φ = 35407824.

The previous prime is 70815637. The next prime is 70815671. The reversal of 70815664 is 46651807.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2212974 + ... + 2213005.

It is an arithmetic number, because the mean of its divisors is an integer number (13720538).

Almost surely, 2^70815664 is an apocalyptic number.

It is an amenable number.

70815664 is a deficient number, since it is larger than the sum of its proper divisors (66389716).

70815664 is a wasteful number, since it uses less digits than its factorization.

70815664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425987 (or 4425981 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 70815664 is about 8415.2043350117. The cubic root of 70815664 is about 413.7231067182.

The spelling of 70815664 in words is "seventy million, eight hundred fifteen thousand, six hundred sixty-four".