663676 has 12 divisors (see below), whose sum is σ = 1250872. Its totient is φ = 306288.

The previous prime is 663661. The next prime is 663683. The reversal of 663676 is 676366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6330 + ... + 6433.

2⁶⁶³⁶⁷⁶ is an apocalyptic number.

It is an amenable number.

663676 is a deficient number, since it is larger than the sum of its proper divisors (587196).

663676 is a wasteful number, since it uses less digits than its factorization.

663676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12780 (or 12778 counting only the distinct ones).

The product of its digits is 27216, while the sum is 34.

The square root of 663676 is about 814.6631205597. The cubic root of 663676 is about 87.2272212520.

The spelling of 663676 in words is "six hundred sixty-three thousand, six hundred seventy-six".