663111256 has 32 divisors (see below), whose sum is σ = 1275436800. Its totient is φ = 323033760.

The previous prime is 663111223. The next prime is 663111257. The reversal of 663111256 is 652111366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663111257) 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, 148821 + ... + 153211.

It is an arithmetic number, because the mean of its divisors is an integer number (39857400).

Almost surely, 2^663111256 is an apocalyptic number.

It is an amenable number.

663111256 is a deficient number, since it is larger than the sum of its proper divisors (612325544).

663111256 is a wasteful number, since it uses less digits than its factorization.

663111256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4879 (or 4875 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 663111256 is about 25750.9467010438. The cubic root of 663111256 is about 872.0247271556.

The spelling of 663111256 in words is "six hundred sixty-three million, one hundred eleven thousand, two hundred fifty-six".