166817317530 has 16 divisors (see below), whose sum is σ = 400361562144. Its totient is φ = 44484618000.

The previous prime is 166817317519. The next prime is 166817317559. The reversal of 166817317530 is 35713718661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 166817317530.

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, 2780288596 + ... + 2780288655.

It is an arithmetic number, because the mean of its divisors is an integer number (25022597634).

Almost surely, 2^166817317530 is an apocalyptic number.

166817317530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166817317530 is an abundant number, since it is smaller than the sum of its proper divisors (233544244614).

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

166817317530 is a wasteful number, since it uses less digits than its factorization.

166817317530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560577261.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 166817317530 in words is "one hundred sixty-six billion, eight hundred seventeen million, three hundred seventeen thousand, five hundred thirty".