663625313 has 12 divisors (see below), whose sum is σ = 720074988. Its totient is φ = 611320320.

The previous prime is 663625309. The next prime is 663625343. The reversal of 663625313 is 313526366.

663625313 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 6 ways, for example, as 172869904 + 490755409 = 13148^2 + 22153^2 .

It is not a de Polignac number, because 663625313 - 2² = 663625309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663625343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84281 + ... + 91817.

It is an arithmetic number, because the mean of its divisors is an integer number (60006249).

Almost surely, 2^663625313 is an apocalyptic number.

It is an amenable number.

663625313 is a deficient number, since it is larger than the sum of its proper divisors (56449675).

663625313 is a wasteful number, since it uses less digits than its factorization.

663625313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8084 (or 8071 counting only the distinct ones).

The product of its digits is 58320, while the sum is 35.

The square root of 663625313 is about 25760.9260897197. The cubic root of 663625313 is about 872.2500059078.

The spelling of 663625313 in words is "six hundred sixty-three million, six hundred twenty-five thousand, three hundred thirteen".