665025625 has 20 divisors (see below), whose sum is σ = 906572304. Its totient is φ = 483650000.

The previous prime is 665025587. The next prime is 665025629. The reversal of 665025625 is 526520566.

It is not a de Polignac number, because 665025625 - 2¹⁵ = 664992857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665025629) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 41491 + ... + 55240.

Almost surely, 2^665025625 is an apocalyptic number.

It is an amenable number.

665025625 is a deficient number, since it is larger than the sum of its proper divisors (241546679).

665025625 is an equidigital number, since it uses as much as digits as its factorization.

665025625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96762 (or 96747 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 665025625 is about 25788.0907591082. The cubic root of 665025625 is about 872.8630848178.

It can be divided in two parts, 66502 and 5625, that added together give a palindrome (72127).

The spelling of 665025625 in words is "six hundred sixty-five million, twenty-five thousand, six hundred twenty-five".