663325 has 18 divisors (see below), whose sum is σ = 896334. Its totient is φ = 486720.

The previous prime is 663319. The next prime is 663331. The reversal of 663325 is 523366.

It is an interprime number because it is at equal distance from previous prime (663319) and next prime (663331).

It can be written as a sum of positive squares in 9 ways, for example, as 488601 + 174724 = 699^2 + 418^2 .

It is a de Polignac number, because none of the positive numbers 2^k-663325 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 663325.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4147 + ... + 4303.

2⁶⁶³³²⁵ is an apocalyptic number.

663325 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

663325 is a deficient number, since it is larger than the sum of its proper divisors (233009).

663325 is a wasteful number, since it uses less digits than its factorization.

663325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 175 counting only the distinct ones).

The product of its digits is 3240, while the sum is 25.

The square root of 663325 is about 814.4476655992. The cubic root of 663325 is about 87.2118411802.

The spelling of 663325 in words is "six hundred sixty-three thousand, three hundred twenty-five".