166851836867 has 2 divisors, whose sum is σ = 166851836868. Its totient is φ = 166851836866.

The previous prime is 166851836849. The next prime is 166851836887. The reversal of 166851836867 is 768638158661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166851836867 - 2³² = 162556869571 is a prime.

It is not a weakly prime, because it can be changed into another prime (166851836887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83425918433 + 83425918434.

It is an arithmetic number, because the mean of its divisors is an integer number (83425918434).

Almost surely, 2^166851836867 is an apocalyptic number.

166851836867 is a deficient number, since it is larger than the sum of its proper divisors (1).

166851836867 is an equidigital number, since it uses as much as digits as its factorization.

166851836867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69672960, while the sum is 65.

The spelling of 166851836867 in words is "one hundred sixty-six billion, eight hundred fifty-one million, eight hundred thirty-six thousand, eight hundred sixty-seven".