166216163 has 2 divisors, whose sum is σ = 166216164. Its totient is φ = 166216162.

The previous prime is 166216159. The next prime is 166216181. The reversal of 166216163 is 361612661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166216163 - 2² = 166216159 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166216763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83108081 + 83108082.

It is an arithmetic number, because the mean of its divisors is an integer number (83108082).

Almost surely, 2^166216163 is an apocalyptic number.

166216163 is a deficient number, since it is larger than the sum of its proper divisors (1).

166216163 is an equidigital number, since it uses as much as digits as its factorization.

166216163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 166216163 is about 12892.4847488760. The cubic root of 166216163 is about 549.8249172742.

The spelling of 166216163 in words is "one hundred sixty-six million, two hundred sixteen thousand, one hundred sixty-three".