663926 has 8 divisors (see below), whose sum is σ = 1030320. Its totient is φ = 320488.

The previous prime is 663907. The next prime is 663937. The reversal of 663926 is 629366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 663892 and 663901.

It is a congruent number.

It is an unprimeable number.

663926 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5666 + ... + 5781.

It is an arithmetic number, because the mean of its divisors is an integer number (128790).

2⁶⁶³⁹²⁶ is an apocalyptic number.

663926 is a deficient number, since it is larger than the sum of its proper divisors (366394).

663926 is a wasteful number, since it uses less digits than its factorization.

663926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11478.

The product of its digits is 11664, while the sum is 32.

The square root of 663926 is about 814.8165437692. The cubic root of 663926 is about 87.2381724128.

The spelling of 663926 in words is "six hundred sixty-three thousand, nine hundred twenty-six".