91566976 has 32 divisors (see below), whose sum is σ = 184120200. Its totient is φ = 45356544.

The previous prime is 91566967. The next prime is 91566977. The reversal of 91566976 is 67966519.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×91566976² = 16769022187569152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91566977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10671 + ... + 17233.

Almost surely, 2^91566976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91566976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92060100).

91566976 is an abundant number, since it is smaller than the sum of its proper divisors (92553224).

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

91566976 is a wasteful number, since it uses less digits than its factorization.

91566976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686 (or 6674 counting only the distinct ones).

The product of its digits is 612360, while the sum is 49.

The square root of 91566976 is about 9569.0634860471. The cubic root of 91566976 is about 450.7263594394.

The spelling of 91566976 in words is "ninety-one million, five hundred sixty-six thousand, nine hundred seventy-six".