165378575 has 6 divisors (see below), whose sum is σ = 205069464. Its totient is φ = 132302840.

The previous prime is 165378569. The next prime is 165378581. The reversal of 165378575 is 575873561.

It is an interprime number because it is at equal distance from previous prime (165378569) and next prime (165378581).

It is not a de Polignac number, because 165378575 - 2⁸ = 165378319 is a prime.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 3307547 + ... + 3307596.

It is an arithmetic number, because the mean of its divisors is an integer number (34178244).

Almost surely, 2^165378575 is an apocalyptic number.

165378575 is a deficient number, since it is larger than the sum of its proper divisors (39690889).

165378575 is an equidigital number, since it uses as much as digits as its factorization.

165378575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6615153 (or 6615148 counting only the distinct ones).

The product of its digits is 882000, while the sum is 47.

The square root of 165378575 is about 12859.9601476832. The cubic root of 165378575 is about 548.8998117336.

The spelling of 165378575 in words is "one hundred sixty-five million, three hundred seventy-eight thousand, five hundred seventy-five".