64328664 has 32 divisors (see below), whose sum is σ = 161910000. Its totient is φ = 21297792.

The previous prime is 64328659. The next prime is 64328683. The reversal of 64328664 is 46682346.

It is a nude number because it is divisible by every one of its digits.

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, 5419 + ... + 12570.

Almost surely, 2^64328664 is an apocalyptic number.

It is an amenable number.

64328664 is an abundant number, since it is smaller than the sum of its proper divisors (97581336).

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

64328664 is a wasteful number, since it uses less digits than its factorization.

64328664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18147 (or 18143 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 64328664 is about 8020.5151954223. The cubic root of 64328664 is about 400.6835479069.

The spelling of 64328664 in words is "sixty-four million, three hundred twenty-eight thousand, six hundred sixty-four".