663326 has 4 divisors (see below), whose sum is σ = 994992. Its totient is φ = 331662.

The previous prime is 663319. The next prime is 663331. The reversal of 663326 is 623366.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 623366 = 2 ⋅311683.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 663295 and 663304.

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 as a sum of consecutive naturals, namely, 165830 + ... + 165833.

It is an arithmetic number, because the mean of its divisors is an integer number (248748).

2⁶⁶³³²⁶ is an apocalyptic number.

663326 is a deficient number, since it is larger than the sum of its proper divisors (331666).

663326 is a wasteful number, since it uses less digits than its factorization.

663326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331665.

The product of its digits is 3888, while the sum is 26.

The square root of 663326 is about 814.4482795120. The cubic root of 663326 is about 87.2118850058.

It can be divided in two parts, 663 and 326, that added together give a palindrome (989).

The spelling of 663326 in words is "six hundred sixty-three thousand, three hundred twenty-six".