91166740 has 24 divisors (see below), whose sum is σ = 218800512. Its totient is φ = 31257120.

The previous prime is 91166737. The next prime is 91166759. The reversal of 91166740 is 4766119.

It is a super-2 number, since 2×91166740² = 16622748964455200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91166696 and 91166705.

It is a congruent number.

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, 325456 + ... + 325735.

It is an arithmetic number, because the mean of its divisors is an integer number (9116688).

Almost surely, 2^91166740 is an apocalyptic number.

It is an amenable number.

91166740 is an abundant number, since it is smaller than the sum of its proper divisors (127633772).

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

91166740 is a wasteful number, since it uses less digits than its factorization.

91166740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651207 (or 651205 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 91166740 is about 9548.1275651302. The cubic root of 91166740 is about 450.0686973310.

The spelling of 91166740 in words is "ninety-one million, one hundred sixty-six thousand, seven hundred forty".