166722784113285 has 48 divisors (see below), whose sum is σ = 301261841008128. Its totient is φ = 85198484304000.

The previous prime is 166722784113227. The next prime is 166722784113311. The reversal of 166722784113285 is 582311487227661.

166722784113285 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 227 + 84 + 1 + 1 + 328 + 5 = 666.

It is not a de Polignac number, because 166722784113285 - 2¹¹ = 166722784111237 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 591515247 + ... + 591797036.

It is an arithmetic number, because the mean of its divisors is an integer number (6276288354336).

Almost surely, 2^{166722784113285} is an apocalyptic number.

166722784113285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166722784113285 is a deficient number, since it is larger than the sum of its proper divisors (134539056894843).

166722784113285 is a wasteful number, since it uses less digits than its factorization.

166722784113285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183312426 (or 1183312423 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 63.

The spelling of 166722784113285 in words is "one hundred sixty-six trillion, seven hundred twenty-two billion, seven hundred eighty-four million, one hundred thirteen thousand, two hundred eighty-five".