166943821233 has 64 divisors (see below), whose sum is σ = 272051609600. Its totient is φ = 88941265920.

The previous prime is 166943821199. The next prime is 166943821321. The reversal of 166943821233 is 332128349661.

166943821233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166943821233 - 2⁹ = 166943820721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166943831233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9857613 + ... + 9874533.

It is an arithmetic number, because the mean of its divisors is an integer number (4250806400).

Almost surely, 2^166943821233 is an apocalyptic number.

It is an amenable number.

166943821233 is a deficient number, since it is larger than the sum of its proper divisors (105107788367).

166943821233 is a wasteful number, since it uses less digits than its factorization.

166943821233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17342.

The product of its digits is 1119744, while the sum is 48.

The spelling of 166943821233 in words is "one hundred sixty-six billion, nine hundred forty-three million, eight hundred twenty-one thousand, two hundred thirty-three".