166489994 has 16 divisors (see below), whose sum is σ = 273119040. Its totient is φ = 75488160.

The previous prime is 166489963. The next prime is 166490003. The reversal of 166489994 is 499984661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254 + ... + 18249.

It is an arithmetic number, because the mean of its divisors is an integer number (17069940).

Almost surely, 2^166489994 is an apocalyptic number.

166489994 is a deficient number, since it is larger than the sum of its proper divisors (106629046).

166489994 is a wasteful number, since it uses less digits than its factorization.

166489994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18925.

The product of its digits is 3359232, while the sum is 56.

The square root of 166489994 is about 12903.1001701142. The cubic root of 166489994 is about 550.1266859687.

The spelling of 166489994 in words is "one hundred sixty-six million, four hundred eighty-nine thousand, nine hundred ninety-four".