6681677 has 2 divisors, whose sum is σ = 6681678. Its totient is φ = 6681676.

The previous prime is 6681671. The next prime is 6681679. The reversal of 6681677 is 7761866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6120676 + 561001 = 2474^2 + 749^2 .

It is a cyclic number.

It is not a de Polignac number, because 6681677 - 2⁸ = 6681421 is a prime.

Together with 6681679, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6681671) 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, 3340838 + 3340839.

It is an arithmetic number, because the mean of its divisors is an integer number (3340839).

Almost surely, 2^6681677 is an apocalyptic number.

It is an amenable number.

6681677 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681677 is an equidigital number, since it uses as much as digits as its factorization.

6681677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 6681677 is about 2584.8940016952. The cubic root of 6681677 is about 188.3483525409.

The spelling of 6681677 in words is "six million, six hundred eighty-one thousand, six hundred seventy-seven".