64664580 has 24 divisors (see below), whose sum is σ = 181060992. Its totient is φ = 17243872.

The previous prime is 64664573. The next prime is 64664591. The reversal of 64664580 is 8546646.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 538812 + ... + 538931.

It is an arithmetic number, because the mean of its divisors is an integer number (7544208).

Almost surely, 2^64664580 is an apocalyptic number.

64664580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64664580 is an abundant number, since it is smaller than the sum of its proper divisors (116396412).

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

64664580 is a wasteful number, since it uses less digits than its factorization.

64664580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077755 (or 1077753 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 64664580 is about 8041.4289774890. The cubic root of 64664580 is about 401.3797767346.

The spelling of 64664580 in words is "sixty-four million, six hundred sixty-four thousand, five hundred eighty".