166503618163 has 2 divisors, whose sum is σ = 166503618164. Its totient is φ = 166503618162.

The previous prime is 166503618133. The next prime is 166503618179. The reversal of 166503618163 is 361816305661.

166503618163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166503618163 - 2¹³ = 166503609971 is a prime.

It is a super-2 number, since 2×166503618163² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166503618133) 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, 83251809081 + 83251809082.

It is an arithmetic number, because the mean of its divisors is an integer number (83251809082).

Almost surely, 2^166503618163 is an apocalyptic number.

166503618163 is a deficient number, since it is larger than the sum of its proper divisors (1).

166503618163 is an equidigital number, since it uses as much as digits as its factorization.

166503618163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 166503618163 in words is "one hundred sixty-six billion, five hundred three million, six hundred eighteen thousand, one hundred sixty-three".