5556663 has 24 divisors (see below), whose sum is σ = 9240608. Its totient is φ = 3151872.

The previous prime is 5556659. The next prime is 5556667. The reversal of 5556663 is 3666555.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5556659) and next prime (5556667).

It is not a de Polignac number, because 5556663 - 2² = 5556659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5556667) 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 23 ways as a sum of consecutive naturals, for example, 11931 + ... + 12387.

Almost surely, 2^5556663 is an apocalyptic number.

5556663 is a deficient number, since it is larger than the sum of its proper divisors (3683945).

5556663 is a wasteful number, since it uses less digits than its factorization.

5556663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 660 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 5556663 is about 2357.2575166918. The cubic root of 5556663 is about 177.1215291018.

The spelling of 5556663 in words is "five million, five hundred fifty-six thousand, six hundred sixty-three".