128166 has 16 divisors (see below), whose sum is σ = 263088. Its totient is φ = 41600.

The previous prime is 128159. The next prime is 128173. The reversal of 128166 is 661821.

128166 is nontrivially palindromic in base 5.

It is an interprime number because it is at equal distance from previous prime (128159) and next prime (128173).

It is a congruent number.

It is an unprimeable number.

128166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (16443).

2¹²⁸¹⁶⁶ is an apocalyptic number.

128166 is an abundant number, since it is smaller than the sum of its proper divisors (134922).

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

128166 is a wasteful number, since it uses less digits than its factorization.

128166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567.

The product of its digits is 576, while the sum is 24.

The square root of 128166 is about 358.0027932852. The cubic root of 128166 is about 50.4186187194.

Adding to 128166 its reverse (661821), we get a palindrome (789987).

The spelling of 128166 in words is "one hundred twenty-eight thousand, one hundred sixty-six".