663388 has 12 divisors (see below), whose sum is σ = 1266552. Its totient is φ = 301520.

The previous prime is 663371. The next prime is 663407. The reversal of 663388 is 883366.

It is a zygodrome in base 10.

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 3 ways as a sum of consecutive naturals, for example, 7495 + ... + 7582.

It is an arithmetic number, because the mean of its divisors is an integer number (105546).

2⁶⁶³³⁸⁸ is an apocalyptic number.

It is an amenable number.

663388 is a deficient number, since it is larger than the sum of its proper divisors (603164).

663388 is a wasteful number, since it uses less digits than its factorization.

663388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15092 (or 15090 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 663388 is about 814.4863411992. The cubic root of 663388 is about 87.2146021053.

The spelling of 663388 in words is "six hundred sixty-three thousand, three hundred eighty-eight".