6681877 has 2 divisors, whose sum is σ = 6681878. Its totient is φ = 6681876.

The previous prime is 6681847. The next prime is 6681887. The reversal of 6681877 is 7781866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5447556 + 1234321 = 2334^2 + 1111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6681877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6681817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340938 + 3340939.

It is an arithmetic number, because the mean of its divisors is an integer number (3340939).

Almost surely, 2^6681877 is an apocalyptic number.

It is an amenable number.

6681877 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681877 is an equidigital number, since it uses as much as digits as its factorization.

6681877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 43.

The square root of 6681877 is about 2584.9326877116. The cubic root of 6681877 is about 188.3502317744.

The spelling of 6681877 in words is "six million, six hundred eighty-one thousand, eight hundred seventy-seven".