91661084 has 12 divisors (see below), whose sum is σ = 160476624. Its totient is φ = 45810624.

The previous prime is 91661051. The next prime is 91661147. The reversal of 91661084 is 48016619.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11252 + ... + 17604.

It is an arithmetic number, because the mean of its divisors is an integer number (13373052).

Almost surely, 2^91661084 is an apocalyptic number.

It is an amenable number.

91661084 is a deficient number, since it is larger than the sum of its proper divisors (68815540).

91661084 is a wasteful number, since it uses less digits than its factorization.

91661084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9964 (or 9962 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 91661084 is about 9573.9795278661. The cubic root of 91661084 is about 450.8807179757.

The spelling of 91661084 in words is "ninety-one million, six hundred sixty-one thousand, eighty-four".