665225036 has 48 divisors (see below), whose sum is σ = 1403592960. Its totient is φ = 269490240.

The previous prime is 665225027. The next prime is 665225153. The reversal of 665225036 is 630522566.

665225036 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 665224987 and 665225005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298406 + ... + 300626.

It is an arithmetic number, because the mean of its divisors is an integer number (29241520).

Almost surely, 2^665225036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665225036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (701796480).

665225036 is an abundant number, since it is smaller than the sum of its proper divisors (738367924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665225036 is a wasteful number, since it uses less digits than its factorization.

665225036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814 (or 2812 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 665225036 is about 25791.9568082765. The cubic root of 665225036 is about 872.9503201060.

The spelling of 665225036 in words is "six hundred sixty-five million, two hundred twenty-five thousand, thirty-six".