65506668328 has 32 divisors (see below), whose sum is σ = 127426672800. Its totient is φ = 31532734912.

The previous prime is 65506668319. The next prime is 65506668343. The reversal of 65506668328 is 82386660556.

It is a super-2 number, since 2×65506668328² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326350 + ... + 487357.

It is an arithmetic number, because the mean of its divisors is an integer number (3982083525).

Almost surely, 2^65506668328 is an apocalyptic number.

It is an amenable number.

65506668328 is a deficient number, since it is larger than the sum of its proper divisors (61920004472).

65506668328 is a wasteful number, since it uses less digits than its factorization.

65506668328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814089 (or 814085 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 55.

The spelling of 65506668328 in words is "sixty-five billion, five hundred six million, six hundred sixty-eight thousand, three hundred twenty-eight".