65566918464 has 28 divisors (see below), whose sum is σ = 173479138944. Its totient is φ = 21855639424.

The previous prime is 65566918429. The next prime is 65566918489. The reversal of 65566918464 is 46481966556.

It is a junction number, because it is equal to n+sod(n) for n = 65566918398 and 65566918407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170746992 + ... + 170747375.

Almost surely, 2^65566918464 is an apocalyptic number.

65566918464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

65566918464 is an abundant number, since it is smaller than the sum of its proper divisors (107912220480).

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

65566918464 is a wasteful number, since it uses less digits than its factorization.

65566918464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341494382 (or 341494372 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 60.

The spelling of 65566918464 in words is "sixty-five billion, five hundred sixty-six million, nine hundred eighteen thousand, four hundred sixty-four".