166688675 has 12 divisors (see below), whose sum is σ = 207200280. Its totient is φ = 133024320.

The previous prime is 166688671. The next prime is 166688677. The reversal of 166688675 is 576886661.

It is not a de Polignac number, because 166688675 - 2² = 166688671 is a prime.

It is a super-2 number, since 2×166688675² = 55570228746511250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166688671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2519 + ... + 18431.

It is an arithmetic number, because the mean of its divisors is an integer number (17266690).

Almost surely, 2^166688675 is an apocalyptic number.

166688675 is a deficient number, since it is larger than the sum of its proper divisors (40511605).

166688675 is a wasteful number, since it uses less digits than its factorization.

166688675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16342 (or 16337 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 166688675 is about 12910.7968383055. The cubic root of 166688675 is about 550.3454303881.

The spelling of 166688675 in words is "one hundred sixty-six million, six hundred eighty-eight thousand, six hundred seventy-five".