166378545333 has 144 divisors (see below), whose sum is σ = 329395248000. Its totient is φ = 79548860160.

The previous prime is 166378545323. The next prime is 166378545337. The reversal of 166378545333 is 333545873661.

166378545333 is a `hidden beast` number, since 1 + 6 + 63 + 7 + 8 + 545 + 3 + 33 = 666.

It is not a de Polignac number, because 166378545333 - 2¹⁶ = 166378479797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166378545333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166378545337) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 22635943 + ... + 22643291.

It is an arithmetic number, because the mean of its divisors is an integer number (2287467000).

Almost surely, 2^166378545333 is an apocalyptic number.

166378545333 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

166378545333 is a deficient number, since it is larger than the sum of its proper divisors (163016702667).

166378545333 is a wasteful number, since it uses less digits than its factorization.

166378545333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7752 (or 7742 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 54.

The spelling of 166378545333 in words is "one hundred sixty-six billion, three hundred seventy-eight million, five hundred forty-five thousand, three hundred thirty-three".