85865660 has 24 divisors (see below), whose sum is σ = 186135936. Its totient is φ = 33238080.

The previous prime is 85865651. The next prime is 85865677. The reversal of 85865660 is 6656858.

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, 68627 + ... + 69866.

It is an arithmetic number, because the mean of its divisors is an integer number (7755664).

Almost surely, 2^85865660 is an apocalyptic number.

It is an amenable number.

85865660 is an abundant number, since it is smaller than the sum of its proper divisors (100270276).

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

85865660 is a wasteful number, since it uses less digits than its factorization.

85865660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138533 (or 138531 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 85865660 is about 9266.3725372985. The cubic root of 85865660 is about 441.1705402532.

The spelling of 85865660 in words is "eighty-five million, eight hundred sixty-five thousand, six hundred sixty".