Subtracting from 7656 its reverse (6567), we obtain a square (1089 = 332).
7656 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is an alternating number because its digits alternate between odd and even.
It is a plaindrome in base 9.
It is a nialpdrome in base 5.
It is a zygodrome in base 5.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 7656.
It is an unprimeable number.
27656 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 7656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10800).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
7656 is a wasteful number, since it uses less digits than its factorization.
7656 is an evil number, because the sum of its binary digits is even.
The square root of 7656 is about 87.4985714169. The cubic root of 7656 is about 19.7091233820.
The spelling of 7656 in words is "seven thousand, six hundred fifty-six".