166928489 has 16 divisors (see below), whose sum is σ = 207768960. Its totient is φ = 130584960.

The previous prime is 166928477. The next prime is 166928519. The reversal of 166928489 is 984829661.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 166928489 - 2⁴ = 166928473 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166928489.

It is not an unprimeable number, because it can be changed into a prime (166928689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2207 + ... + 18404.

It is an arithmetic number, because the mean of its divisors is an integer number (12985560).

Almost surely, 2^166928489 is an apocalyptic number.

It is an amenable number.

166928489 is a deficient number, since it is larger than the sum of its proper divisors (40840471).

166928489 is a wasteful number, since it uses less digits than its factorization.

166928489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20720.

The product of its digits is 1492992, while the sum is 53.

The square root of 166928489 is about 12920.0808434003. The cubic root of 166928489 is about 550.6092301461.

The spelling of 166928489 in words is "one hundred sixty-six million, nine hundred twenty-eight thousand, four hundred eighty-nine".