166881286132236 has 120 divisors (see below), whose sum is σ = 479815310251200. Its totient is φ = 50255575469568.

The previous prime is 166881286132229. The next prime is 166881286132277. The reversal of 166881286132236 is 632231682188661.

166881286132236 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 8 + 1 + 2 + 8 + 613 + 2 + 2 + 3 + 6 = 666.

It is a super-2 number, since 2×166881286132236² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 421296061 + ... + 421691988.

It is an arithmetic number, because the mean of its divisors is an integer number (3998460918760).

Almost surely, 2^{166881286132236} is an apocalyptic number.

It is an amenable number.

166881286132236 is an abundant number, since it is smaller than the sum of its proper divisors (312934024118964).

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

166881286132236 is a wasteful number, since it uses less digits than its factorization.

166881286132236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842988125 (or 842988114 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 63.

The spelling of 166881286132236 in words is "one hundred sixty-six trillion, eight hundred eighty-one billion, two hundred eighty-six million, one hundred thirty-two thousand, two hundred thirty-six".