64000656 has 30 divisors (see below), whose sum is σ = 179113350. Its totient is φ = 21333504.

The previous prime is 64000649. The next prime is 64000661. The reversal of 64000656 is 65600046.

64000656 is a `hidden beast` number, since 6 + 4 + 0 + 0 + 0 + 656 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56250000 + 7750656 = 7500^2 + 2784^2 .

64000656 is a modest number, since divided by 656 gives 640 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222081 + ... + 222368.

It is an arithmetic number, because the mean of its divisors is an integer number (5970445).

Almost surely, 2^64000656 is an apocalyptic number.

It is an amenable number.

64000656 is an abundant number, since it is smaller than the sum of its proper divisors (115112694).

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

64000656 is a wasteful number, since it uses less digits than its factorization.

64000656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444463 (or 444454 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 64000656 is about 8000.0409998949. The cubic root of 64000656 is about 400.0013666620.

The spelling of 64000656 in words is "sixty-four million, six hundred fifty-six", and thus it is an aban number.