85666564700 has 36 divisors (see below), whose sum is σ = 187633818792. Its totient is φ = 33946372800.

The previous prime is 85666564699. The next prime is 85666564721. The reversal of 85666564700 is 746566658.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3992411 + ... + 4013810.

It is an arithmetic number, because the mean of its divisors is an integer number (5212050522).

Almost surely, 2^85666564700 is an apocalyptic number.

It is an amenable number.

85666564700 is an abundant number, since it is smaller than the sum of its proper divisors (101967254092).

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

85666564700 is a wasteful number, since it uses less digits than its factorization.

85666564700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8006342 (or 8006335 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 85666564700 in words is "eighty-five billion, six hundred sixty-six million, five hundred sixty-four thousand, seven hundred".