663902 has 8 divisors (see below), whose sum is σ = 1003536. Its totient is φ = 329392.

The previous prime is 663893. The next prime is 663907. The reversal of 663902 is 209366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663907) 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, 938 + ... + 1485.

It is an arithmetic number, because the mean of its divisors is an integer number (125442).

2⁶⁶³⁹⁰² is an apocalyptic number.

663902 is a deficient number, since it is larger than the sum of its proper divisors (339634).

663902 is a wasteful number, since it uses less digits than its factorization.

663902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 663902 is about 814.8018163946. The cubic root of 663902 is about 87.2371212207.

The spelling of 663902 in words is "six hundred sixty-three thousand, nine hundred two".