166766137 has 2 divisors, whose sum is σ = 166766138. Its totient is φ = 166766136.

The previous prime is 166766051. The next prime is 166766177. The reversal of 166766137 is 731667661.

166766137 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 can be written as a sum of positive squares in only one way, i.e., 119486761 + 47279376 = 10931^2 + 6876^2 .

It is a cyclic number.

It is not a de Polignac number, because 166766137 - 2²⁷ = 32548409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166766093 and 166766102.

It is not a weakly prime, because it can be changed into another prime (166766177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83383068 + 83383069.

It is an arithmetic number, because the mean of its divisors is an integer number (83383069).

Almost surely, 2^166766137 is an apocalyptic number.

It is an amenable number.

166766137 is a deficient number, since it is larger than the sum of its proper divisors (1).

166766137 is an equidigital number, since it uses as much as digits as its factorization.

166766137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 43.

The square root of 166766137 is about 12913.7963821643. The cubic root of 166766137 is about 550.4306676441.

The spelling of 166766137 in words is "one hundred sixty-six million, seven hundred sixty-six thousand, one hundred thirty-seven".