665235625 has 10 divisors (see below), whose sum is σ = 831279218. Its totient is φ = 532188000.

The previous prime is 665235607. The next prime is 665235629. The reversal of 665235625 is 526532566.

665235625 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 5 ways, for example, as 180311184 + 484924441 = 13428^2 + 22021^2 .

It is not a de Polignac number, because 665235625 - 2¹⁹ = 664711337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665235629) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 531564 + ... + 532813.

Almost surely, 2^665235625 is an apocalyptic number.

It is an amenable number.

665235625 is a deficient number, since it is larger than the sum of its proper divisors (166043593).

665235625 is an equidigital number, since it uses as much as digits as its factorization.

665235625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064397 (or 1064382 counting only the distinct ones).

The product of its digits is 324000, while the sum is 40.

The square root of 665235625 is about 25792.1620846334. The cubic root of 665235625 is about 872.9549519330.

The spelling of 665235625 in words is "six hundred sixty-five million, two hundred thirty-five thousand, six hundred twenty-five".