166056289 has 16 divisors (see below), whose sum is σ = 203212800. Its totient is φ = 132447744.

The previous prime is 166056263. The next prime is 166056301. The reversal of 166056289 is 982650661.

166056289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166056289 - 2⁹ = 166055777 is a prime.

It is a super-2 number, since 2×166056289² = 55149382232903042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166056229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2752 + ... + 18430.

It is an arithmetic number, because the mean of its divisors is an integer number (12700800).

Almost surely, 2^166056289 is an apocalyptic number.

It is an amenable number.

166056289 is a deficient number, since it is larger than the sum of its proper divisors (37156511).

166056289 is a wasteful number, since it uses less digits than its factorization.

166056289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15792.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 166056289 is about 12886.2829784232. The cubic root of 166056289 is about 549.6485788139.

The spelling of 166056289 in words is "one hundred sixty-six million, fifty-six thousand, two hundred eighty-nine".