166918028 has 6 divisors (see below), whose sum is σ = 292106556. Its totient is φ = 83459012.

The previous prime is 166918013. The next prime is 166918033. The reversal of 166918028 is 820819661.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20864750 + ... + 20864757.

It is an arithmetic number, because the mean of its divisors is an integer number (48684426).

Almost surely, 2^166918028 is an apocalyptic number.

It is an amenable number.

166918028 is a deficient number, since it is larger than the sum of its proper divisors (125188528).

166918028 is a wasteful number, since it uses less digits than its factorization.

166918028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41729511 (or 41729509 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 166918028 is about 12919.6760021295. The cubic root of 166918028 is about 550.5977281281.

The spelling of 166918028 in words is "one hundred sixty-six million, nine hundred eighteen thousand, twenty-eight".