90556660 has 24 divisors (see below), whose sum is σ = 200178720. Its totient is φ = 34316064.

The previous prime is 90556657. The next prime is 90556691. The reversal of 90556660 is 6665509.

It is a happy number.

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, 118774 + ... + 119533.

It is an arithmetic number, because the mean of its divisors is an integer number (8340780).

Almost surely, 2^90556660 is an apocalyptic number.

It is an amenable number.

90556660 is an abundant number, since it is smaller than the sum of its proper divisors (109622060).

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

90556660 is a wasteful number, since it uses less digits than its factorization.

90556660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238335 (or 238333 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 90556660 is about 9516.1263127388. The cubic root of 90556660 is about 449.0625091749.

The spelling of 90556660 in words is "ninety million, five hundred fifty-six thousand, six hundred sixty".