91566444 has 24 divisors (see below), whose sum is σ = 213817968. Its totient is φ = 30498880.

The previous prime is 91566383. The next prime is 91566469. The reversal of 91566444 is 44466519.

It is a super-3 number, since 3×91566444³ (a number of 25 digits) contains 333 as substring.

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, 22054 + ... + 25874.

It is an arithmetic number, because the mean of its divisors is an integer number (8909082).

Almost surely, 2^91566444 is an apocalyptic number.

It is an amenable number.

91566444 is an abundant number, since it is smaller than the sum of its proper divisors (122251524).

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

91566444 is a wasteful number, since it uses less digits than its factorization.

91566444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5825 (or 5823 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 91566444 is about 9569.0356880931. The cubic root of 91566444 is about 450.7254865378.

The spelling of 91566444 in words is "ninety-one million, five hundred sixty-six thousand, four hundred forty-four".