663661204 has 12 divisors (see below), whose sum is σ = 1171685844. Its totient is φ = 328893824.

The previous prime is 663661189. The next prime is 663661247. The reversal of 663661204 is 402166366.

663661204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 104244100 + 559417104 = 10210^2 + 23652^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 663661204.

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, 733687 + ... + 734590.

It is an arithmetic number, because the mean of its divisors is an integer number (97640487).

Almost surely, 2^663661204 is an apocalyptic number.

It is an amenable number.

663661204 is a deficient number, since it is larger than the sum of its proper divisors (508024640).

663661204 is a wasteful number, since it uses less digits than its factorization.

663661204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468394 (or 1468392 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 663661204 is about 25761.6226973380. The cubic root of 663661204 is about 872.2657303234.

The spelling of 663661204 in words is "six hundred sixty-three million, six hundred sixty-one thousand, two hundred four".