85666972916 has 24 divisors (see below), whose sum is σ = 171379615680. Its totient is φ = 36704630592.

The previous prime is 85666972907. The next prime is 85666972957. The reversal of 85666972916 is 61927966658.

It is a congruent number.

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, 300350 + ... + 511413.

It is an arithmetic number, because the mean of its divisors is an integer number (7140817320).

Almost surely, 2^85666972916 is an apocalyptic number.

It is an amenable number.

85666972916 is an abundant number, since it is smaller than the sum of its proper divisors (85712642764).

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

85666972916 is a wasteful number, since it uses less digits than its factorization.

85666972916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815543 (or 815541 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 65.

The spelling of 85666972916 in words is "eighty-five billion, six hundred sixty-six million, nine hundred seventy-two thousand, nine hundred sixteen".