166885089 has 8 divisors (see below), whose sum is σ = 254301120. Its totient is φ = 95362896.

The previous prime is 166885013. The next prime is 166885091. The reversal of 166885089 is 980588661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166885089 - 2⁸ = 166884833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166885009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3973434 + ... + 3973475.

It is an arithmetic number, because the mean of its divisors is an integer number (31787640).

Almost surely, 2^166885089 is an apocalyptic number.

It is an amenable number.

166885089 is a deficient number, since it is larger than the sum of its proper divisors (87416031).

166885089 is an equidigital number, since it uses as much as digits as its factorization.

166885089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7946919.

The product of its (nonzero) digits is 829440, while the sum is 51.

The square root of 166885089 is about 12918.4011781644. The cubic root of 166885089 is about 550.5615080906.

The spelling of 166885089 in words is "one hundred sixty-six million, eight hundred eighty-five thousand, eighty-nine".