166556056 has 32 divisors (see below), whose sum is σ = 327859200. Its totient is φ = 79218720.

The previous prime is 166556023. The next prime is 166556057. The reversal of 166556056 is 650655661.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166556057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8941 + ... + 20323.

It is an arithmetic number, because the mean of its divisors is an integer number (10245600).

Almost surely, 2^166556056 is an apocalyptic number.

It is an amenable number.

166556056 is a deficient number, since it is larger than the sum of its proper divisors (161303144).

166556056 is a wasteful number, since it uses less digits than its factorization.

166556056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11479 (or 11475 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 166556056 is about 12905.6598436500. The cubic root of 166556056 is about 550.1994384156.

The spelling of 166556056 in words is "one hundred sixty-six million, five hundred fifty-six thousand, fifty-six".