166556396 has 12 divisors (see below), whose sum is σ = 301524720. Its totient is φ = 80406480.

The previous prime is 166556389. The next prime is 166556399. The reversal of 166556396 is 693655661.

It is a self number, because there is not a number n which added to its sum of digits gives 166556396.

It is not an unprimeable number, because it can be changed into a prime (166556399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717800 + ... + 718031.

It is an arithmetic number, because the mean of its divisors is an integer number (25127060).

Almost surely, 2^166556396 is an apocalyptic number.

It is an amenable number.

166556396 is a deficient number, since it is larger than the sum of its proper divisors (134968324).

166556396 is a wasteful number, since it uses less digits than its factorization.

166556396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435864 (or 1435862 counting only the distinct ones).

The product of its digits is 874800, while the sum is 47.

The square root of 166556396 is about 12905.6730161584. The cubic root of 166556396 is about 550.1998127995.

The spelling of 166556396 in words is "one hundred sixty-six million, five hundred fifty-six thousand, three hundred ninety-six".