91566 has 12 divisors (see below), whose sum is σ = 198432. Its totient is φ = 30516.

The previous prime is 91541. The next prime is 91571. The reversal of 91566 is 66519.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2526 + ... + 2561.

It is an arithmetic number, because the mean of its divisors is an integer number (16536).

2⁹¹⁵⁶⁶ is an apocalyptic number.

91566 is an abundant number, since it is smaller than the sum of its proper divisors (106866).

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

91566 is a wasteful number, since it uses less digits than its factorization.

91566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095 (or 5092 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 91566 is about 302.5987442142. The cubic root of 91566 is about 45.0724758023.

The spelling of 91566 in words is "ninety-one thousand, five hundred sixty-six".