91660156 has 24 divisors (see below), whose sum is σ = 183555680. Its totient is φ = 39232512.

The previous prime is 91660117. The next prime is 91660157. The reversal of 91660156 is 65106619.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91660157) 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, 27340 + ... + 30508.

Almost surely, 2^91660156 is an apocalyptic number.

It is an amenable number.

91660156 is an abundant number, since it is smaller than the sum of its proper divisors (91895524).

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

91660156 is a wasteful number, since it uses less digits than its factorization.

91660156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213 (or 4211 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 91660156 is about 9573.9310630482. The cubic root of 91660156 is about 450.8791963604.

The spelling of 91660156 in words is "ninety-one million, six hundred sixty thousand, one hundred fifty-six".