663317 has 8 divisors (see below), whose sum is σ = 696600. Its totient is φ = 630784.

The previous prime is 663301. The next prime is 663319. The reversal of 663317 is 713366.

663317 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 4 ways, for example, as 192721 + 470596 = 439^2 + 686^2 .

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 663317 - 2⁴ = 663301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663319) 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, 2453 + ... + 2709.

It is an arithmetic number, because the mean of its divisors is an integer number (87075).

2⁶⁶³³¹⁷ is an apocalyptic number.

It is an amenable number.

663317 is a deficient number, since it is larger than the sum of its proper divisors (33283).

663317 is a wasteful number, since it uses less digits than its factorization.

663317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375.

The product of its digits is 2268, while the sum is 26.

The square root of 663317 is about 814.4427542805. The cubic root of 663317 is about 87.2114905740.

The spelling of 663317 in words is "six hundred sixty-three thousand, three hundred seventeen".