91970664 has 16 divisors (see below), whose sum is σ = 229926720. Its totient is φ = 30656880.

The previous prime is 91970651. The next prime is 91970689. The reversal of 91970664 is 46607919.

It is a super-3 number, since 3×91970664³ (a number of 25 digits) contains 333 as substring.

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, 1916032 + ... + 1916079.

It is an arithmetic number, because the mean of its divisors is an integer number (14370420).

Almost surely, 2^91970664 is an apocalyptic number.

It is an amenable number.

91970664 is an abundant number, since it is smaller than the sum of its proper divisors (137956056).

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

91970664 is a wasteful number, since it uses less digits than its factorization.

91970664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832120 (or 3832116 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 91970664 is about 9590.1336799859. The cubic root of 91970664 is about 451.3877554066.

The spelling of 91970664 in words is "ninety-one million, nine hundred seventy thousand, six hundred sixty-four".