663831460 has 24 divisors (see below), whose sum is σ = 1442117880. Its totient is φ = 256376064.

The previous prime is 663831449. The next prime is 663831461. The reversal of 663831460 is 64138366.

It can be written as a sum of positive squares in 4 ways, for example, as 7139584 + 656691876 = 2672^2 + 25626^2 .

It is not an unprimeable number, because it can be changed into a prime (663831461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 571689 + ... + 572848.

It is an arithmetic number, because the mean of its divisors is an integer number (60088245).

Almost surely, 2^663831460 is an apocalyptic number.

It is an amenable number.

663831460 is an abundant number, since it is smaller than the sum of its proper divisors (778286420).

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

663831460 is a wasteful number, since it uses less digits than its factorization.

663831460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144575 (or 1144573 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 663831460 is about 25764.9269356620. The cubic root of 663831460 is about 872.3403144514.

The spelling of 663831460 in words is "six hundred sixty-three million, eight hundred thirty-one thousand, four hundred sixty".