64600664 has 8 divisors (see below), whose sum is σ = 121126260. Its totient is φ = 32300328.

The previous prime is 64600651. The next prime is 64600681. The reversal of 64600664 is 46600646.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 64600664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4037534 + ... + 4037549.

Almost surely, 2^64600664 is an apocalyptic number.

It is an amenable number.

64600664 is a deficient number, since it is larger than the sum of its proper divisors (56525596).

64600664 is a wasteful number, since it uses less digits than its factorization.

64600664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8075089 (or 8075085 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 64600664 is about 8037.4538256839. The cubic root of 64600664 is about 401.2474887185.

The spelling of 64600664 in words is "sixty-four million, six hundred thousand, six hundred sixty-four".