166426163 has 2 divisors, whose sum is σ = 166426164. Its totient is φ = 166426162.

The previous prime is 166426159. The next prime is 166426171. The reversal of 166426163 is 361624661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166426163 - 2² = 166426159 is a prime.

It is not a weakly prime, because it can be changed into another prime (166426133) 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, 83213081 + 83213082.

It is an arithmetic number, because the mean of its divisors is an integer number (83213082).

Almost surely, 2^166426163 is an apocalyptic number.

166426163 is a deficient number, since it is larger than the sum of its proper divisors (1).

166426163 is an equidigital number, since it uses as much as digits as its factorization.

166426163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 166426163 is about 12900.6264576570. The cubic root of 166426163 is about 550.0563721834.

The spelling of 166426163 in words is "one hundred sixty-six million, four hundred twenty-six thousand, one hundred sixty-three".