676661 has 2 divisors, whose sum is σ = 676662. Its totient is φ = 676660.

The previous prime is 676649. The next prime is 676679. The reversal of 676661 is 166676.

676661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630436 + 46225 = 794^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 676661 - 2⁶ = 676597 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 676661.

It is not a weakly prime, because it can be changed into another prime (676601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338330 + 338331.

It is an arithmetic number, because the mean of its divisors is an integer number (338331).

2⁶⁷⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

676661 is a deficient number, since it is larger than the sum of its proper divisors (1).

676661 is an equidigital number, since it uses as much as digits as its factorization.

676661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 676661 is about 822.5940675692. The cubic root of 676661 is about 87.7924257039.

It can be divided in two parts, 6 and 76661, that added together give a palindrome (76667).

The spelling of 676661 in words is "six hundred seventy-six thousand, six hundred sixty-one".