166504128 has 56 divisors (see below), whose sum is σ = 503480832. Its totient is φ = 47572224.

The previous prime is 166504123. The next prime is 166504141. The reversal of 166504128 is 821405661.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (166504123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60600 + ... + 63287.

Almost surely, 2^166504128 is an apocalyptic number.

It is an amenable number.

166504128 is an abundant number, since it is smaller than the sum of its proper divisors (336976704).

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

166504128 is a wasteful number, since it uses less digits than its factorization.

166504128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123909 (or 123899 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 166504128 is about 12903.6478563234. The cubic root of 166504128 is about 550.1422530114.

Adding to 166504128 its reverse (821405661), we get a palindrome (987909789).

The spelling of 166504128 in words is "one hundred sixty-six million, five hundred four thousand, one hundred twenty-eight".