165575601 has 12 divisors (see below), whose sum is σ = 239316480. Its totient is φ = 110313720.

The previous prime is 165575593. The next prime is 165575609. The reversal of 165575601 is 106575561.

It is an interprime number because it is at equal distance from previous prime (165575593) and next prime (165575609).

It is not a de Polignac number, because 165575601 - 2³ = 165575593 is a prime.

It is a super-2 number, since 2×165575601² = 54830559293022402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165575609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12016 + ... + 21806.

It is an arithmetic number, because the mean of its divisors is an integer number (19943040).

Almost surely, 2^165575601 is an apocalyptic number.

It is an amenable number.

165575601 is a deficient number, since it is larger than the sum of its proper divisors (73740879).

165575601 is a wasteful number, since it uses less digits than its factorization.

165575601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11676 (or 11673 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 165575601 is about 12867.6183110939. The cubic root of 165575601 is about 549.1177049624.

It can be divided in two parts, 165575 and 601, that added together give a triangular number (166176 = T₅₇₆).

The spelling of 165575601 in words is "one hundred sixty-five million, five hundred seventy-five thousand, six hundred one".