166863838042923 has 64 divisors (see below), whose sum is σ = 271432968929280. Its totient is φ = 89056091779200.

The previous prime is 166863838042897. The next prime is 166863838042931. The reversal of 166863838042923 is 329240838368661.

It is not a de Polignac number, because 166863838042923 - 2⁶ = 166863838042859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166863838042963) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 711422238 + ... + 711656748.

It is an arithmetic number, because the mean of its divisors is an integer number (4241140139520).

Almost surely, 2^{166863838042923} is an apocalyptic number.

166863838042923 is a deficient number, since it is larger than the sum of its proper divisors (104569130886357).

166863838042923 is a wasteful number, since it uses less digits than its factorization.

166863838042923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259728.

The product of its (nonzero) digits is 429981696, while the sum is 69.

The spelling of 166863838042923 in words is "one hundred sixty-six trillion, eight hundred sixty-three billion, eight hundred thirty-eight million, forty-two thousand, nine hundred twenty-three".