166218887616 has 56 divisors (see below), whose sum is σ = 451673640720. Its totient is φ = 53908826112.

The previous prime is 166218887503. The next prime is 166218887621. The reversal of 166218887616 is 616788812661.

It is a happy number.

166218887616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 166218887616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11691861 + ... + 11706068.

Almost surely, 2^166218887616 is an apocalyptic number.

166218887616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166218887616 is an abundant number, since it is smaller than the sum of its proper divisors (285454753104).

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

166218887616 is a wasteful number, since it uses less digits than its factorization.

166218887616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23397981 (or 23397971 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 60.

The spelling of 166218887616 in words is "one hundred sixty-six billion, two hundred eighteen million, eight hundred eighty-seven thousand, six hundred sixteen".