166680189 has 48 divisors (see below), whose sum is σ = 280530432. Its totient is φ = 94431744.

The previous prime is 166680187. The next prime is 166680203. The reversal of 166680189 is 981086661.

It is a happy number.

It is not a de Polignac number, because 166680189 - 2¹ = 166680187 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166680181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92592 + ... + 94374.

It is an arithmetic number, because the mean of its divisors is an integer number (5844384).

Almost surely, 2^166680189 is an apocalyptic number.

It is an amenable number.

166680189 is a deficient number, since it is larger than the sum of its proper divisors (113850243).

166680189 is a wasteful number, since it uses less digits than its factorization.

166680189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866 (or 1863 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 166680189 is about 12910.4681944537. The cubic root of 166680189 is about 550.3360910002.

The spelling of 166680189 in words is "one hundred sixty-six million, six hundred eighty thousand, one hundred eighty-nine".