166727129 has 2 divisors, whose sum is σ = 166727130. Its totient is φ = 166727128.

The previous prime is 166727123. The next prime is 166727149. The reversal of 166727129 is 921727661.

166727129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94867600 + 71859529 = 9740^2 + 8477^2 .

It is a cyclic number.

It is not a de Polignac number, because 166727129 - 2⁸ = 166726873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166727123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83363564 + 83363565.

It is an arithmetic number, because the mean of its divisors is an integer number (83363565).

Almost surely, 2^166727129 is an apocalyptic number.

It is an amenable number.

166727129 is a deficient number, since it is larger than the sum of its proper divisors (1).

166727129 is an equidigital number, since it uses as much as digits as its factorization.

166727129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 166727129 is about 12912.2859711207. The cubic root of 166727129 is about 550.3877475122.

The spelling of 166727129 in words is "one hundred sixty-six million, seven hundred twenty-seven thousand, one hundred twenty-nine".