91664010 has 24 divisors (see below), whose sum is σ = 238326660. Its totient is φ = 24443712.

The previous prime is 91663997. The next prime is 91664033. The reversal of 91664010 is 1046619.

91664010 is a `hidden beast` number, since 9 + 1 + 6 + 640 + 10 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 86881041 + 4782969 = 9321^2 + 2187^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 509155 + ... + 509334.

Almost surely, 2^91664010 is an apocalyptic number.

91664010 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

91664010 is an abundant number, since it is smaller than the sum of its proper divisors (146662650).

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

91664010 is a wasteful number, since it uses less digits than its factorization.

91664010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018502 (or 1018499 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 91664010 is about 9574.1323366663. The cubic root of 91664010 is about 450.8855155877.

The spelling of 91664010 in words is "ninety-one million, six hundred sixty-four thousand, ten".