65987864960 has 64 divisors (see below), whose sum is σ = 158956657200. Its totient is φ = 26193623040.

The previous prime is 65987864953. The next prime is 65987864977. The reversal of 65987864960 is 6946878956.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309695 + ... + 477374.

Almost surely, 2^65987864960 is an apocalyptic number.

It is an amenable number.

65987864960 is an abundant number, since it is smaller than the sum of its proper divisors (92968792240).

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

65987864960 is a wasteful number, since it uses less digits than its factorization.

65987864960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787219 (or 787207 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 68.

The spelling of 65987864960 in words is "sixty-five billion, nine hundred eighty-seven million, eight hundred sixty-four thousand, nine hundred sixty".