663231560 has 32 divisors (see below), whose sum is σ = 1509046200. Its totient is φ = 262310400.

The previous prime is 663231551. The next prime is 663231563. The reversal of 663231560 is 65132366.

It can be written as a sum of positive squares in 4 ways, for example, as 419184676 + 244046884 = 20474^2 + 15622^2 .

It is a super-2 number, since 2×663231560² = 879752204360067200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (663231563) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 89591 + ... + 96710.

Almost surely, 2^663231560 is an apocalyptic number.

It is an amenable number.

663231560 is an abundant number, since it is smaller than the sum of its proper divisors (845814640).

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

663231560 is a wasteful number, since it uses less digits than its factorization.

663231560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186401 (or 186397 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 663231560 is about 25753.2825092259. The cubic root of 663231560 is about 872.0774592415.

The spelling of 663231560 in words is "six hundred sixty-three million, two hundred thirty-one thousand, five hundred sixty".