65687317056 has 84 divisors (see below), whose sum is σ = 188387790864. Its totient is φ = 21883334400.

The previous prime is 65687317037. The next prime is 65687317067. The reversal of 65687317056 is 65071378656.

65687317056 is a `hidden beast` number, since 6 + 568 + 7 + 3 + 1 + 70 + 5 + 6 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 65687316993 and 65687317011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1011651 + ... + 1074621.

It is an arithmetic number, because the mean of its divisors is an integer number (2242711796).

Almost surely, 2^65687317056 is an apocalyptic number.

It is an amenable number.

65687317056 is an abundant number, since it is smaller than the sum of its proper divisors (122700473808).

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

65687317056 is a wasteful number, since it uses less digits than its factorization.

65687317056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64800 (or 64787 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 65687317056 in words is "sixty-five billion, six hundred eighty-seven million, three hundred seventeen thousand, fifty-six".