166513128 has 32 divisors (see below), whose sum is σ = 430639200. Its totient is φ = 53590208.

The previous prime is 166513117. The next prime is 166513133. The reversal of 166513128 is 821315661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118926 + ... + 120317.

It is an arithmetic number, because the mean of its divisors is an integer number (13457475).

Almost surely, 2^166513128 is an apocalyptic number.

It is an amenable number.

166513128 is an abundant number, since it is smaller than the sum of its proper divisors (264126072).

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

166513128 is a wasteful number, since it uses less digits than its factorization.

166513128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239281 (or 239277 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 166513128 is about 12903.9965902041. The cubic root of 166513128 is about 550.1521650601.

Adding to 166513128 its reverse (821315661), we get a palindrome (987828789).

The spelling of 166513128 in words is "one hundred sixty-six million, five hundred thirteen thousand, one hundred twenty-eight".