166264189 has 16 divisors (see below), whose sum is σ = 207107712. Its totient is φ = 129958848.

The previous prime is 166264181. The next prime is 166264207. The reversal of 166264189 is 981462661.

It is a cyclic number.

It is not a de Polignac number, because 166264189 - 2³ = 166264181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166264181) 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 15 ways as a sum of consecutive naturals, for example, 3454 + ... + 18559.

It is an arithmetic number, because the mean of its divisors is an integer number (12944232).

Almost surely, 2^166264189 is an apocalyptic number.

It is an amenable number.

166264189 is a deficient number, since it is larger than the sum of its proper divisors (40843523).

166264189 is a wasteful number, since it uses less digits than its factorization.

166264189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22116.

The product of its digits is 124416, while the sum is 43.

The square root of 166264189 is about 12894.3471723077. The cubic root of 166264189 is about 549.8778670961.

The spelling of 166264189 in words is "one hundred sixty-six million, two hundred sixty-four thousand, one hundred eighty-nine".