91668672 has 70 divisors (see below), whose sum is σ = 271750028. Its totient is φ = 30554496.

The previous prime is 91668671. The next prime is 91668683. The reversal of 91668672 is 27686619.

It is not an unprimeable number, because it can be changed into a prime (91668671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3658 + ... + 14025.

Almost surely, 2^91668672 is an apocalyptic number.

It is an amenable number.

91668672 is an abundant number, since it is smaller than the sum of its proper divisors (180081356).

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

91668672 is a wasteful number, since it uses less digits than its factorization.

91668672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17707 (or 17688 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 91668672 is about 9574.3758021085. The cubic root of 91668672 is about 450.8931594188.

The spelling of 91668672 in words is "ninety-one million, six hundred sixty-eight thousand, six hundred seventy-two".