166899842227 has 2 divisors, whose sum is σ = 166899842228. Its totient is φ = 166899842226.

The previous prime is 166899842189. The next prime is 166899842267. The reversal of 166899842227 is 722248998661.

It is a happy number.

166899842227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166899842227 - 2³⁵ = 132540103859 is a prime.

It is not a weakly prime, because it can be changed into another prime (166899842267) 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 as a sum of consecutive naturals, namely, 83449921113 + 83449921114.

It is an arithmetic number, because the mean of its divisors is an integer number (83449921114).

Almost surely, 2^166899842227 is an apocalyptic number.

166899842227 is a deficient number, since it is larger than the sum of its proper divisors (1).

166899842227 is an equidigital number, since it uses as much as digits as its factorization.

166899842227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41803776, while the sum is 64.

The spelling of 166899842227 in words is "one hundred sixty-six billion, eight hundred ninety-nine million, eight hundred forty-two thousand, two hundred twenty-seven".