663869315 has 8 divisors (see below), whose sum is σ = 800688240. Its totient is φ = 528398752.

The previous prime is 663869287. The next prime is 663869317. The reversal of 663869315 is 513968366.

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 663869315 - 2⁶ = 663869251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663869315.

It is not an unprimeable number, because it can be changed into a prime (663869317) 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, 336005 + ... + 337974.

It is an arithmetic number, because the mean of its divisors is an integer number (100086030).

Almost surely, 2^663869315 is an apocalyptic number.

663869315 is a deficient number, since it is larger than the sum of its proper divisors (136818925).

663869315 is a wasteful number, since it uses less digits than its factorization.

663869315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674181.

The product of its digits is 699840, while the sum is 47.

The square root of 663869315 is about 25765.6615478819. The cubic root of 663869315 is about 872.3568958765.

The spelling of 663869315 in words is "six hundred sixty-three million, eight hundred sixty-nine thousand, three hundred fifteen".