128081166 has 32 divisors (see below), whose sum is σ = 270153600. Its totient is φ = 40370400.

The previous prime is 128081159. The next prime is 128081207. The reversal of 128081166 is 661180821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119280 + ... + 120348.

It is an arithmetic number, because the mean of its divisors is an integer number (8442300).

Almost surely, 2^128081166 is an apocalyptic number.

128081166 is an abundant number, since it is smaller than the sum of its proper divisors (142072434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128081166 is a wasteful number, since it uses less digits than its factorization.

128081166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 128081166 is about 11317.2949948298. The cubic root of 128081166 is about 504.0749211499.

The spelling of 128081166 in words is "one hundred twenty-eight million, eighty-one thousand, one hundred sixty-six".