65691000688 has 20 divisors (see below), whose sum is σ = 127554832000. Its totient is φ = 32773624704.

The previous prime is 65691000673. The next prime is 65691000737. The reversal of 65691000688 is 88600019656.

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, 4484688 + ... + 4499311.

It is an arithmetic number, because the mean of its divisors is an integer number (6377741600).

Almost surely, 2^65691000688 is an apocalyptic number.

It is an amenable number.

65691000688 is a deficient number, since it is larger than the sum of its proper divisors (61863831312).

65691000688 is a wasteful number, since it uses less digits than its factorization.

65691000688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8984464 (or 8984458 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 65691000688 in words is "sixty-five billion, six hundred ninety-one million, six hundred eighty-eight", and thus it is an aban number.