Subtracting from 676 its product of digits (252), we obtain a palindrome (424).
The square root of 676 is 26.
676 is nontrivially palindromic in base 5, base 10, base 11 and base 12.
676 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
676 is an esthetic number in base 10 and base 11, because in such bases its adjacent digits differ by 1.
It is an alternating number because its digits alternate between even and odd.
It is a Duffinian number.
676 is an undulating number in base 10, base 11 and base 12.
It is a plaindrome in base 8.
It is a nialpdrome in base 4, base 9 and base 13.
676 is the 26-th square number.
It is an amenable number.
676 is a wasteful number, since it uses less digits than its factorization.
676 is an evil number, because the sum of its binary digits is even.
The cubic root of 676 is about 8.7763829553.