166613025381804 has 36 divisors (see below), whose sum is σ = 421161300255696. Its totient is φ = 55537596374688.

The previous prime is 166613025381799. The next prime is 166613025381823. The reversal of 166613025381804 is 408183520316661.

It is a happy number.

166613025381804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26050882 + ... + 31809974.

Almost surely, 2^{166613025381804} is an apocalyptic number.

It is an amenable number.

166613025381804 is an abundant number, since it is smaller than the sum of its proper divisors (254548274873892).

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

166613025381804 is a wasteful number, since it uses less digits than its factorization.

166613025381804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6562726 (or 6562721 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 166613025381804 in words is "one hundred sixty-six trillion, six hundred thirteen billion, twenty-five million, three hundred eighty-one thousand, eight hundred four".