5663556 has 18 divisors (see below), whose sum is σ = 14316302. Its totient is φ = 1887840.

The previous prime is 5663549. The next prime is 5663561. The reversal of 5663556 is 6553665.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5616900 + 46656 = 2370^2 + 216^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 157321 = 5663556 / (5 + 6 + 6 + 3 + 5 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 5663556.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 78625 + ... + 78696.

Almost surely, 2^5663556 is an apocalyptic number.

It is an amenable number.

5663556 is an abundant number, since it is smaller than the sum of its proper divisors (8652746).

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

5663556 is a wasteful number, since it uses less digits than its factorization.

5663556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157331 (or 157326 counting only the distinct ones).

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

The square root of 5663556 is about 2379.8226824703. The cubic root of 5663556 is about 178.2500798304.

The spelling of 5663556 in words is "five million, six hundred sixty-three thousand, five hundred fifty-six".