663044 has 12 divisors (see below), whose sum is σ = 1210944. Its totient is φ = 317064.

The previous prime is 663037. The next prime is 663049. The reversal of 663044 is 440366.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (663049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3512 + ... + 3695.

It is an arithmetic number, because the mean of its divisors is an integer number (100912).

2⁶⁶³⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

663044 is a deficient number, since it is larger than the sum of its proper divisors (547900).

663044 is a wasteful number, since it uses less digits than its factorization.

663044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7234 (or 7232 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 663044 is about 814.2751377759. The cubic root of 663044 is about 87.1995244482.

The spelling of 663044 in words is "six hundred sixty-three thousand, forty-four".