191664882 has 48 divisors (see below), whose sum is σ = 422898840. Its totient is φ = 62726400.

The previous prime is 191664877. The next prime is 191664901. The reversal of 191664882 is 288466191.

191664882 is a `hidden beast` number, since 1 + 9 + 166 + 488 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 104223681 + 87441201 = 10209^2 + 9351^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289632 + ... + 290292.

Almost surely, 2^191664882 is an apocalyptic number.

191664882 is an abundant number, since it is smaller than the sum of its proper divisors (231233958).

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

191664882 is a wasteful number, since it uses less digits than its factorization.

191664882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 936 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 191664882 is about 13844.3086501277. The cubic root of 191664882 is about 576.5639911346.

The spelling of 191664882 in words is "one hundred ninety-one million, six hundred sixty-four thousand, eight hundred eighty-two".