166071757 has 2 divisors, whose sum is σ = 166071758. Its totient is φ = 166071756.

The previous prime is 166071751. The next prime is 166071767. The reversal of 166071757 is 757170661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137030436 + 29041321 = 11706^2 + 5389^2 .

It is a cyclic number.

It is not a de Polignac number, because 166071757 - 2²⁷ = 31854029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166071751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83035878 + 83035879.

It is an arithmetic number, because the mean of its divisors is an integer number (83035879).

Almost surely, 2^166071757 is an apocalyptic number.

It is an amenable number.

166071757 is a deficient number, since it is larger than the sum of its proper divisors (1).

166071757 is an equidigital number, since it uses as much as digits as its factorization.

166071757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 166071757 is about 12886.8831375162. The cubic root of 166071757 is about 549.6656447142.

The spelling of 166071757 in words is "one hundred sixty-six million, seventy-one thousand, seven hundred fifty-seven".