91088666596 has 24 divisors (see below), whose sum is σ = 161259116760. Its totient is φ = 45015032832.

The previous prime is 91088666567. The next prime is 91088666597. The reversal of 91088666596 is 69566688019.

It can be written as a sum of positive squares in 4 ways, for example, as 4025902500 + 87062764096 = 63450^2 + 295064^2 .

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (91088666597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888760 + ... + 985936.

It is an arithmetic number, because the mean of its divisors is an integer number (6719129865).

Almost surely, 2^91088666596 is an apocalyptic number.

It is an amenable number.

91088666596 is a deficient number, since it is larger than the sum of its proper divisors (70170450164).

91088666596 is a wasteful number, since it uses less digits than its factorization.

91088666596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99903 (or 99901 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 64.

The spelling of 91088666596 in words is "ninety-one billion, eighty-eight million, six hundred sixty-six thousand, five hundred ninety-six".