663683 has 2 divisors, whose sum is σ = 663684. Its totient is φ = 663682.

The previous prime is 663661. The next prime is 663709. The reversal of 663683 is 386366.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663683 - 2¹⁸ = 401539 is a prime.

It is not a weakly prime, because it can be changed into another prime (663653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331841 + 331842.

It is an arithmetic number, because the mean of its divisors is an integer number (331842).

2⁶⁶³⁶⁸³ is an apocalyptic number.

663683 is a deficient number, since it is larger than the sum of its proper divisors (1).

663683 is an equidigital number, since it uses as much as digits as its factorization.

663683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 663683 is about 814.6674168027. The cubic root of 663683 is about 87.2275279220.

The spelling of 663683 in words is "six hundred sixty-three thousand, six hundred eighty-three".