166242757 has 2 divisors, whose sum is σ = 166242758. Its totient is φ = 166242756.

The previous prime is 166242701. The next prime is 166242829. The reversal of 166242757 is 757242661.

166242757 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., 137147521 + 29095236 = 11711^2 + 5394^2 .

It is a cyclic number.

It is not a de Polignac number, because 166242757 - 2²⁷ = 32025029 is a prime.

It is a super-2 number, since 2×166242757² = 55273308509922098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166242157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83121378 + 83121379.

It is an arithmetic number, because the mean of its divisors is an integer number (83121379).

Almost surely, 2^166242757 is an apocalyptic number.

It is an amenable number.

166242757 is a deficient number, since it is larger than the sum of its proper divisors (1).

166242757 is an equidigital number, since it uses as much as digits as its factorization.

166242757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 166242757 is about 12893.5160836755. The cubic root of 166242757 is about 549.8542390598.

The spelling of 166242757 in words is "one hundred sixty-six million, two hundred forty-two thousand, seven hundred fifty-seven".