165601157 has 8 divisors (see below), whose sum is σ = 168336384. Its totient is φ = 162878688.

The previous prime is 165601123. The next prime is 165601171. The reversal of 165601157 is 751106561.

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

It is a cyclic number.

It is not a de Polignac number, because 165601157 - 2¹⁰ = 165600133 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 (165601187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24998 + ... + 30920.

It is an arithmetic number, because the mean of its divisors is an integer number (21042048).

Almost surely, 2^165601157 is an apocalyptic number.

It is an amenable number.

165601157 is a deficient number, since it is larger than the sum of its proper divisors (2735227).

165601157 is an equidigital number, since it uses as much as digits as its factorization.

165601157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6379.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 165601157 is about 12868.6113081404. The cubic root of 165601157 is about 549.1459549582.

The spelling of 165601157 in words is "one hundred sixty-five million, six hundred one thousand, one hundred fifty-seven".