64665875952 has 120 divisors (see below), whose sum is σ = 199951693344. Its totient is φ = 19405258752.

The previous prime is 64665875933. The next prime is 64665875993. The reversal of 64665875952 is 25957856646.

It is a happy number.

64665875952 is a `hidden beast` number, since 6 + 46 + 6 + 587 + 5 + 9 + 5 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 64665875952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 517953 + ... + 630560.

Almost surely, 2^64665875952 is an apocalyptic number.

It is an amenable number.

64665875952 is an abundant number, since it is smaller than the sum of its proper divisors (135285817392).

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

64665875952 is a wasteful number, since it uses less digits than its factorization.

64665875952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148567 (or 1148558 counting only the distinct ones).

The product of its digits is 108864000, while the sum is 63.

The spelling of 64665875952 in words is "sixty-four billion, six hundred sixty-five million, eight hundred seventy-five thousand, nine hundred fifty-two".