165099925 has 6 divisors (see below), whose sum is σ = 204723938. Its totient is φ = 132079920.

The previous prime is 165099899. The next prime is 165099943. The reversal of 165099925 is 529990561.

It can be written as a sum of positive squares in 3 ways, for example, as 23561316 + 141538609 = 4854^2 + 11897^2 .

It is not a de Polignac number, because 165099925 - 2⁹ = 165099413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3301974 + ... + 3302023.

Almost surely, 2^165099925 is an apocalyptic number.

It is an amenable number.

165099925 is a deficient number, since it is larger than the sum of its proper divisors (39624013).

165099925 is an equidigital number, since it uses as much as digits as its factorization.

165099925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6604007 (or 6604002 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 46.

The square root of 165099925 is about 12849.1215653055. The cubic root of 165099925 is about 548.5913539693.

The spelling of 165099925 in words is "one hundred sixty-five million, ninety-nine thousand, nine hundred twenty-five".