65680864 has 24 divisors (see below), whose sum is σ = 129888360. Its totient is φ = 32693376.

The previous prime is 65680829. The next prime is 65680897. The reversal of 65680864 is 46808656.

It is a self number, because there is not a number n which added to its sum of digits gives 65680864.

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, 2847 + ... + 11809.

It is an arithmetic number, because the mean of its divisors is an integer number (5412015).

Almost surely, 2^65680864 is an apocalyptic number.

It is an amenable number.

65680864 is a deficient number, since it is larger than the sum of its proper divisors (64207496).

65680864 is a wasteful number, since it uses less digits than its factorization.

65680864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9202 (or 9194 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 65680864 is about 8104.3731404718. The cubic root of 65680864 is about 403.4715831119.

The spelling of 65680864 in words is "sixty-five million, six hundred eighty thousand, eight hundred sixty-four".