165266825 has 6 divisors (see below), whose sum is σ = 204930894. Its totient is φ = 132213440.

The previous prime is 165266819. The next prime is 165266837. The reversal of 165266825 is 528662561.

165266825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 41011216 + 124255609 = 6404^2 + 11147^2 .

It is not a de Polignac number, because 165266825 - 2¹⁸ = 165004681 is a prime.

It is a Duffinian 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, 3305312 + ... + 3305361.

It is an arithmetic number, because the mean of its divisors is an integer number (34155149).

Almost surely, 2^165266825 is an apocalyptic number.

It is an amenable number.

165266825 is a deficient number, since it is larger than the sum of its proper divisors (39664069).

165266825 is an equidigital number, since it uses as much as digits as its factorization.

165266825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610683 (or 6610678 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 165266825 is about 12855.6145321801. The cubic root of 165266825 is about 548.7761492513.

The spelling of 165266825 in words is "one hundred sixty-five million, two hundred sixty-six thousand, eight hundred twenty-five".