165925057 has 8 divisors (see below), whose sum is σ = 170596136. Its totient is φ = 161263872.

The previous prime is 165924977. The next prime is 165925079. The reversal of 165925057 is 750529561.

It can be written as a sum of positive squares in 4 ways, for example, as 1290496 + 164634561 = 1136^2 + 12831^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165925057 is a prime.

It is a super-2 number, since 2×165925057² = 55062249080906498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165925957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43033 + ... + 46729.

It is an arithmetic number, because the mean of its divisors is an integer number (21324517).

Almost surely, 2^165925057 is an apocalyptic number.

It is an amenable number.

165925057 is a deficient number, since it is larger than the sum of its proper divisors (4671079).

165925057 is a wasteful number, since it uses less digits than its factorization.

165925057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4947.

The product of its (nonzero) digits is 94500, while the sum is 40.

The square root of 165925057 is about 12881.1900459546. The cubic root of 165925057 is about 549.5037474185.

The spelling of 165925057 in words is "one hundred sixty-five million, nine hundred twenty-five thousand, fifty-seven".