663020 has 12 divisors (see below), whose sum is σ = 1392384. Its totient is φ = 265200.

The previous prime is 663007. The next prime is 663031. The reversal of 663020 is 20366.

It is a self number, because there is not a number n which added to its sum of digits gives 663020.

It is an unprimeable number.

663020 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16556 + ... + 16595.

It is an arithmetic number, because the mean of its divisors is an integer number (116032).

2⁶⁶³⁰²⁰ is an apocalyptic number.

It is an amenable number.

663020 is an abundant number, since it is smaller than the sum of its proper divisors (729364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663020 is a wasteful number, since it uses less digits than its factorization.

663020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33160 (or 33158 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 663020 is about 814.2604006090. The cubic root of 663020 is about 87.1984723240.

Adding to 663020 its reverse (20366), we get a palindrome (683386).

The spelling of 663020 in words is "six hundred sixty-three thousand, twenty".