64578664 has 16 divisors (see below), whose sum is σ = 126349920. Its totient is φ = 30885360.

The previous prime is 64578643. The next prime is 64578671. The reversal of 64578664 is 46687546.

64578664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175302 + ... + 175669.

It is an arithmetic number, because the mean of its divisors is an integer number (7896870).

Almost surely, 2^64578664 is an apocalyptic number.

It is an amenable number.

64578664 is a deficient number, since it is larger than the sum of its proper divisors (61771256).

64578664 is a wasteful number, since it uses less digits than its factorization.

64578664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351000 (or 350996 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 64578664 is about 8036.0851165228. The cubic root of 64578664 is about 401.2019347646.

The spelling of 64578664 in words is "sixty-four million, five hundred seventy-eight thousand, six hundred sixty-four".