It is a nude number because it is divisible by every one of its digits.
It is a congruent number.
26636 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 6636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6636 is a wasteful number, since it uses less digits than its factorization.
6636 is an evil number, because the sum of its binary digits is even.
The square root of 6636 is about 81.4616474177. The cubic root of 6636 is about 18.7918177764.
The spelling of 6636 in words is "six thousand, six hundred thirty-six".