• 676 can be written using four 4's:

676 has 9 divisors (see below), whose sum is σ = 1281. Its totient is φ = 312.

The previous prime is 673. The next prime is 677.

676 = T_{3} + T_{4} + ... +
T_{15}.

The square root of 676 is 26.

It is a perfect power (a square), and thus also a powerful number.

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 can be written as a sum of positive squares in only one way, i.e., 100 + 576 = 10^2 + 24^2 .

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.

It is not an unprimeable number, because it can be changed into a prime (673) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 46 + ... + 58.

676 is the 26-th square number.

It is an amenable number.

676 is a deficient number, since it is larger than the sum of its proper divisors (605).

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 sum of its prime factors is 30 (or 15 counting only the distinct ones).

The product of its digits is 252, while the sum is 19.

The cubic root of 676 is about 8.7763829553.

Subtracting from 676 its product of digits (252), we obtain a palindrome (424).

The spelling of 676 in words is "six hundred seventy-six", and thus it is an aban number and an oban number.

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