64156664 has 32 divisors (see below), whose sum is σ = 141326640. Its totient is φ = 26918400.

The previous prime is 64156661. The next prime is 64156667. The reversal of 64156664 is 46665146.

It is an interprime number because it is at equal distance from previous prime (64156661) and next prime (64156667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64156661) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26897 + ... + 29184.

Almost surely, 2^64156664 is an apocalyptic number.

It is an amenable number.

64156664 is an abundant number, since it is smaller than the sum of its proper divisors (77169976).

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

64156664 is a wasteful number, since it uses less digits than its factorization.

64156664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56111 (or 56107 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 64156664 is about 8009.7855152307. The cubic root of 64156664 is about 400.3261173797.

The spelling of 64156664 in words is "sixty-four million, one hundred fifty-six thousand, six hundred sixty-four".