165440575 has 12 divisors (see below), whose sum is σ = 205308040. Its totient is φ = 132248160.

The previous prime is 165440567. The next prime is 165440591. The reversal of 165440575 is 575044561.

It is a happy number.

It is not a de Polignac number, because 165440575 - 2³ = 165440567 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52957 + ... + 55993.

Almost surely, 2^165440575 is an apocalyptic number.

165440575 is a deficient number, since it is larger than the sum of its proper divisors (39867465).

165440575 is a wasteful number, since it uses less digits than its factorization.

165440575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5226 (or 5221 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 165440575 is about 12862.3705046931. The cubic root of 165440575 is about 548.9683968700.

The spelling of 165440575 in words is "one hundred sixty-five million, four hundred forty thousand, five hundred seventy-five".