663553851313 has 8 divisors (see below), whose sum is σ = 702593732808. Its totient is φ = 624514781184.

The previous prime is 663553851287. The next prime is 663553851319. The reversal of 663553851313 is 313158355366.

It can be written as a sum of positive squares in 4 ways, for example, as 453613026064 + 209940825249 = 673508^2 + 458193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663553851313 - 2³³ = 654963916721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663553851319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2543145 + ... + 2791897.

It is an arithmetic number, because the mean of its divisors is an integer number (87824216601).

Almost surely, 2^663553851313 is an apocalyptic number.

It is an amenable number.

663553851313 is a deficient number, since it is larger than the sum of its proper divisors (39039881495).

663553851313 is a wasteful number, since it uses less digits than its factorization.

663553851313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405683.

The product of its digits is 2916000, while the sum is 49.

The spelling of 663553851313 in words is "six hundred sixty-three billion, five hundred fifty-three million, eight hundred fifty-one thousand, three hundred thirteen".