166615028 has 24 divisors (see below), whose sum is σ = 324979200. Its totient is φ = 74279808.

The previous prime is 166615027. The next prime is 166615037. The reversal of 166615028 is 820516661.

It is a happy number.

It is a super-3 number, since 3×166615028³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166615027) 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, 63188 + ... + 65771.

It is an arithmetic number, because the mean of its divisors is an integer number (13540800).

Almost surely, 2^166615028 is an apocalyptic number.

It is an amenable number.

166615028 is a deficient number, since it is larger than the sum of its proper divisors (158364172).

166615028 is a wasteful number, since it uses less digits than its factorization.

166615028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128999 (or 128997 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 166615028 is about 12907.9443754612. The cubic root of 166615028 is about 550.2643665714.

The spelling of 166615028 in words is "one hundred sixty-six million, six hundred fifteen thousand, twenty-eight".