It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is a zygodrome in base 10.
6600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 6600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6600 is a wasteful number, since it uses less digits than its factorization.
6600 is an evil number, because the sum of its binary digits is even.
The square root of 6600 is about 81.2403840464. The cubic root of 6600 is about 18.7577745537.
Adding to 6600 its reverse (66), we get a palindrome (6666).
Multiplying 6600 by its reverse (66), we get a square (435600 = 6602).
6600 divided by its reverse (66) gives a square (100 = 102).
The spelling of 6600 in words is "six thousand, six hundred".