166585550451408 has 120 divisors (see below), whose sum is σ = 527427427546656. Its totient is φ = 50480469820800.

The previous prime is 166585550451389. The next prime is 166585550451413. The reversal of 166585550451408 is 804154055585661.

166585550451408 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 85 + 5 + 504 + 5 + 1 + 40 + 8 = 666.

It is a super-2 number, since 2×166585550451408² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1947506223 + ... + 1947591758.

Almost surely, 2^{166585550451408} is an apocalyptic number.

166585550451408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

166585550451408 is an abundant number, since it is smaller than the sum of its proper divisors (360841877095248).

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

166585550451408 is a wasteful number, since it uses less digits than its factorization.

166585550451408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3895098015 (or 3895097997 counting only the distinct ones).

The product of its (nonzero) digits is 115200000, while the sum is 63.

The spelling of 166585550451408 in words is "one hundred sixty-six trillion, five hundred eighty-five billion, five hundred fifty million, four hundred fifty-one thousand, four hundred eight".