85511660 has 24 divisors (see below), whose sum is σ = 193388496. Its totient is φ = 31573440.

The previous prime is 85511653. The next prime is 85511669. The reversal of 85511660 is 6611558.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (85511669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164186 + ... + 164705.

It is an arithmetic number, because the mean of its divisors is an integer number (8057854).

Almost surely, 2^85511660 is an apocalyptic number.

It is an amenable number.

85511660 is an abundant number, since it is smaller than the sum of its proper divisors (107876836).

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

85511660 is a wasteful number, since it uses less digits than its factorization.

85511660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328913 (or 328911 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 85511660 is about 9247.2514835490. The cubic root of 85511660 is about 440.5634310969.

The spelling of 85511660 in words is "eighty-five million, five hundred eleven thousand, six hundred sixty".