663329 has 4 divisors (see below), whose sum is σ = 665280. Its totient is φ = 661380.

The previous prime is 663319. The next prime is 663331. The reversal of 663329 is 923366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663329 is a prime.

It is a Duffinian number.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 317 + ... + 1194.

It is an arithmetic number, because the mean of its divisors is an integer number (166320).

2⁶⁶³³²⁹ is an apocalyptic number.

It is an amenable number.

663329 is a deficient number, since it is larger than the sum of its proper divisors (1951).

663329 is a wasteful number, since it uses less digits than its factorization.

663329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950.

The product of its digits is 5832, while the sum is 29.

The square root of 663329 is about 814.4501212475. The cubic root of 663329 is about 87.2120164822.

The spelling of 663329 in words is "six hundred sixty-three thousand, three hundred twenty-nine".