165562657 has 4 divisors (see below), whose sum is σ = 178298260. Its totient is φ = 152827056.

The previous prime is 165562651. The next prime is 165562669. The reversal of 165562657 is 756265561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109851361 + 55711296 = 10481^2 + 7464^2 .

It is a cyclic number.

It is not a de Polignac number, because 165562657 - 2¹¹ = 165560609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165562651) 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 3 ways as a sum of consecutive naturals, for example, 6367782 + ... + 6367807.

It is an arithmetic number, because the mean of its divisors is an integer number (44574565).

Almost surely, 2^165562657 is an apocalyptic number.

It is an amenable number.

165562657 is a deficient number, since it is larger than the sum of its proper divisors (12735603).

165562657 is a wasteful number, since it uses less digits than its factorization.

165562657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12735602.

The product of its digits is 378000, while the sum is 43.

The square root of 165562657 is about 12867.1153332827. The cubic root of 165562657 is about 549.1033953564.

The spelling of 165562657 in words is "one hundred sixty-five million, five hundred sixty-two thousand, six hundred fifty-seven".