166256938 has 8 divisors (see below), whose sum is σ = 250639200. Its totient is φ = 82710540.

The previous prime is 166256929. The next prime is 166256953. The reversal of 166256938 is 839652661.

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

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, 208468 + ... + 209263.

It is an arithmetic number, because the mean of its divisors is an integer number (31329900).

Almost surely, 2^166256938 is an apocalyptic number.

166256938 is a deficient number, since it is larger than the sum of its proper divisors (84382262).

166256938 is a wasteful number, since it uses less digits than its factorization.

166256938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417932.

The product of its digits is 466560, while the sum is 46.

The square root of 166256938 is about 12894.0659995209. The cubic root of 166256938 is about 549.8698733475.

The spelling of 166256938 in words is "one hundred sixty-six million, two hundred fifty-six thousand, nine hundred thirty-eight".