65516665694 has 32 divisors (see below), whose sum is σ = 101320644096. Its totient is φ = 31761512640.

The previous prime is 65516665673. The next prime is 65516665703. The reversal of 65516665694 is 49656661556.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3003194 + ... + 3024930.

It is an arithmetic number, because the mean of its divisors is an integer number (3166270128).

Almost surely, 2^65516665694 is an apocalyptic number.

65516665694 is a deficient number, since it is larger than the sum of its proper divisors (35803978402).

65516665694 is a wasteful number, since it uses less digits than its factorization.

65516665694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22160.

The product of its digits is 34992000, while the sum is 59.

The spelling of 65516665694 in words is "sixty-five billion, five hundred sixteen million, six hundred sixty-five thousand, six hundred ninety-four".