663749252 has 12 divisors (see below), whose sum is σ = 1162786716. Its totient is φ = 331524480.

The previous prime is 663749239. The next prime is 663749279. The reversal of 663749252 is 252947366.

It can be written as a sum of positive squares in 2 ways, for example, as 215326276 + 448422976 = 14674^2 + 21176^2 .

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, 83249 + ... + 90872.

It is an arithmetic number, because the mean of its divisors is an integer number (96898893).

Almost surely, 2^663749252 is an apocalyptic number.

It is an amenable number.

663749252 is a deficient number, since it is larger than the sum of its proper divisors (499037464).

663749252 is a wasteful number, since it uses less digits than its factorization.

663749252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175078 (or 175076 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 663749252 is about 25763.3315392245. The cubic root of 663749252 is about 872.3043031456.

The spelling of 663749252 in words is "six hundred sixty-three million, seven hundred forty-nine thousand, two hundred fifty-two".