166683881616 has 40 divisors (see below), whose sum is σ = 492114318144. Its totient is φ = 47623966080.

The previous prime is 166683881599. The next prime is 166683881669. The reversal of 166683881616 is 616188386661.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 166683881616.

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, 248041155 + ... + 248041826.

Almost surely, 2^166683881616 is an apocalyptic number.

166683881616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166683881616 is an abundant number, since it is smaller than the sum of its proper divisors (325430436528).

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

166683881616 is a wasteful number, since it uses less digits than its factorization.

166683881616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496082999 (or 496082993 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 60.

The spelling of 166683881616 in words is "one hundred sixty-six billion, six hundred eighty-three million, eight hundred eighty-one thousand, six hundred sixteen".