91680611 has 8 divisors (see below), whose sum is σ = 100843248. Its totient is φ = 83344800.

The previous prime is 91680587. The next prime is 91680613. The reversal of 91680611 is 11608619.

It is not a de Polignac number, because 91680611 - 2²² = 87486307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91680613) 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, 33110 + ... + 35771.

It is an arithmetic number, because the mean of its divisors is an integer number (12605406).

Almost surely, 2^91680611 is an apocalyptic number.

91680611 is a deficient number, since it is larger than the sum of its proper divisors (9162637).

91680611 is an equidigital number, since it uses as much as digits as its factorization.

91680611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68914 (or 68892 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 91680611 is about 9574.9992689295. Note that the first 3 decimals coincide. The cubic root of 91680611 is about 450.9127334624.

The spelling of 91680611 in words is "ninety-one million, six hundred eighty thousand, six hundred eleven".