85666512 has 20 divisors (see below), whose sum is σ = 221305280. Its totient is φ = 28555488.

The previous prime is 85666501. The next prime is 85666549. The reversal of 85666512 is 21566658.

It is a super-2 number, since 2×85666512² = 14677502556492288, which contains 22 as substring.

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, 892312 + ... + 892407.

It is an arithmetic number, because the mean of its divisors is an integer number (11065264).

Almost surely, 2^85666512 is an apocalyptic number.

It is an amenable number.

85666512 is an abundant number, since it is smaller than the sum of its proper divisors (135638768).

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

85666512 is a wasteful number, since it uses less digits than its factorization.

85666512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784730 (or 1784724 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 85666512 is about 9255.6205626635. The cubic root of 85666512 is about 440.8292076742.

The spelling of 85666512 in words is "eighty-five million, six hundred sixty-six thousand, five hundred twelve".