166888538 has 8 divisors (see below), whose sum is σ = 250931520. Its totient is φ = 83244700.

The previous prime is 166888511. The next prime is 166888549. The reversal of 166888538 is 835888661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 166888538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98738 + ... + 100413.

It is an arithmetic number, because the mean of its divisors is an integer number (31366440).

Almost surely, 2^166888538 is an apocalyptic number.

166888538 is a deficient number, since it is larger than the sum of its proper divisors (84042982).

166888538 is a wasteful number, since it uses less digits than its factorization.

166888538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199572.

The product of its digits is 2211840, while the sum is 53.

The square root of 166888538 is about 12918.5346692262. The cubic root of 166888538 is about 550.5653008672.

The spelling of 166888538 in words is "one hundred sixty-six million, eight hundred eighty-eight thousand, five hundred thirty-eight".