663356 has 12 divisors (see below), whose sum is σ = 1166592. Its totient is φ = 330048.

The previous prime is 663349. The next prime is 663359. The reversal of 663356 is 653366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663359) by changing a digit.

663356 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 1316 + ... + 1748.

It is an arithmetic number, because the mean of its divisors is an integer number (97216).

2⁶⁶³³⁵⁶ is an apocalyptic number.

It is an amenable number.

663356 is a deficient number, since it is larger than the sum of its proper divisors (503236).

663356 is a wasteful number, since it uses less digits than its factorization.

663356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 818 counting only the distinct ones).

The product of its digits is 9720, while the sum is 29.

The square root of 663356 is about 814.4666966795. The cubic root of 663356 is about 87.2131997525.

The spelling of 663356 in words is "six hundred sixty-three thousand, three hundred fifty-six".