663115321 has 8 divisors (see below), whose sum is σ = 725976288. Its totient is φ = 600684000.

The previous prime is 663115307. The next prime is 663115331. The reversal of 663115321 is 123511366.

663115321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 663115321 - 2⁵ = 663115289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663115321.

It is not an unprimeable number, because it can be changed into a prime (663115331) 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, 104175 + ... + 110356.

It is an arithmetic number, because the mean of its divisors is an integer number (90747036).

Almost surely, 2^663115321 is an apocalyptic number.

It is an amenable number.

663115321 is a deficient number, since it is larger than the sum of its proper divisors (62860967).

663115321 is a wasteful number, since it uses less digits than its factorization.

663115321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214823.

The product of its digits is 3240, while the sum is 28.

The square root of 663115321 is about 25751.0256300599. The cubic root of 663115321 is about 872.0265090453.

Adding to 663115321 its reverse (123511366), we get a palindrome (786626687).

It can be divided in two parts, 6631 and 15321, that added together give a cube (21952 = 28³).

The spelling of 663115321 in words is "six hundred sixty-three million, one hundred fifteen thousand, three hundred twenty-one".