165600157 has 4 divisors (see below), whose sum is σ = 165628540. Its totient is φ = 165571776.

The previous prime is 165600137. The next prime is 165600163. The reversal of 165600157 is 751006561.

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 101183481 + 64416676 = 10059^2 + 8026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165600157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165600137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1878 + ... + 18295.

It is an arithmetic number, because the mean of its divisors is an integer number (41407135).

Almost surely, 2^165600157 is an apocalyptic number.

It is an amenable number.

165600157 is a deficient number, since it is larger than the sum of its proper divisors (28383).

165600157 is an equidigital number, since it uses as much as digits as its factorization.

165600157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28382.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 165600157 is about 12868.5724538505. The cubic root of 165600157 is about 549.1448495975.

The spelling of 165600157 in words is "one hundred sixty-five million, six hundred thousand, one hundred fifty-seven".