It is a happy number.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-6637 is a prime.
It is a Chen prime.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 6637.
It is a good prime.
26637 is an apocalyptic number.
It is an amenable number.
6637 is an equidigital number, since it uses as much as digits as its factorization.
6637 is an odious number, because the sum of its binary digits is odd.
The square root of 6637 is about 81.4677850442. The cubic root of 6637 is about 18.7927616619.
Subtracting 6637 from its reverse (7366), we obtain a 6-th power (729 = 36).
The spelling of 6637 in words is "six thousand, six hundred thirty-seven".