91166361 has 24 divisors (see below), whose sum is σ = 143895360. Its totient is φ = 50999520.

The previous prime is 91166353. The next prime is 91166363. The reversal of 91166361 is 16366119.

It is not a de Polignac number, because 91166361 - 2³ = 91166353 is a prime.

It is a super-2 number, since 2×91166361² = 16622610755964642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91166363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4941 + ... + 14378.

It is an arithmetic number, because the mean of its divisors is an integer number (5995640).

Almost surely, 2^91166361 is an apocalyptic number.

It is an amenable number.

91166361 is a deficient number, since it is larger than the sum of its proper divisors (52728999).

91166361 is a wasteful number, since it uses less digits than its factorization.

91166361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19357 (or 19346 counting only the distinct ones).

The product of its digits is 5832, while the sum is 33.

The square root of 91166361 is about 9548.1077182864. The cubic root of 91166361 is about 450.0680736523.

The spelling of 91166361 in words is "ninety-one million, one hundred sixty-six thousand, three hundred sixty-one".