165442757 has 2 divisors, whose sum is σ = 165442758. Its totient is φ = 165442756.

The previous prime is 165442729. The next prime is 165442763. The reversal of 165442757 is 757244561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152127556 + 13315201 = 12334^2 + 3649^2 .

It is a cyclic number.

It is not a de Polignac number, because 165442757 - 2²⁴ = 148665541 is a prime.

It is a super-2 number, since 2×165442757² = 54742611687522098, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165442727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82721378 + 82721379.

It is an arithmetic number, because the mean of its divisors is an integer number (82721379).

Almost surely, 2^165442757 is an apocalyptic number.

It is an amenable number.

165442757 is a deficient number, since it is larger than the sum of its proper divisors (1).

165442757 is an equidigital number, since it uses as much as digits as its factorization.

165442757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 41.

The square root of 165442757 is about 12862.4553254812. The cubic root of 165442757 is about 548.9708103122.

The spelling of 165442757 in words is "one hundred sixty-five million, four hundred forty-two thousand, seven hundred fifty-seven".