663703 has 4 divisors (see below), whose sum is σ = 666720. Its totient is φ = 660688.

The previous prime is 663683. The next prime is 663709. The reversal of 663703 is 307366.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 663703 - 2⁹ = 663191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (166680).

2⁶⁶³⁷⁰³ is an apocalyptic number.

663703 is a deficient number, since it is larger than the sum of its proper divisors (3017).

663703 is a wasteful number, since it uses less digits than its factorization.

663703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 663703 is about 814.6796916580. The cubic root of 663703 is about 87.2284041098.

The spelling of 663703 in words is "six hundred sixty-three thousand, seven hundred three".