166422371 has 2 divisors, whose sum is σ = 166422372. Its totient is φ = 166422370.

The previous prime is 166422359. The next prime is 166422397. The reversal of 166422371 is 173224661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166422371 is a prime.

It is not a weakly prime, because it can be changed into another prime (166422301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83211185 + 83211186.

It is an arithmetic number, because the mean of its divisors is an integer number (83211186).

Almost surely, 2^166422371 is an apocalyptic number.

166422371 is a deficient number, since it is larger than the sum of its proper divisors (1).

166422371 is an equidigital number, since it uses as much as digits as its factorization.

166422371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 166422371 is about 12900.4794872129. The cubic root of 166422371 is about 550.0521944957.

The spelling of 166422371 in words is "one hundred sixty-six million, four hundred twenty-two thousand, three hundred seventy-one".