6681197 has 2 divisors, whose sum is σ = 6681198. Its totient is φ = 6681196.

The previous prime is 6681193. The next prime is 6681203. The reversal of 6681197 is 7911866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5669161 + 1012036 = 2381^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 6681197 - 2² = 6681193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6681197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6681193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340598 + 3340599.

It is an arithmetic number, because the mean of its divisors is an integer number (3340599).

Almost surely, 2^6681197 is an apocalyptic number.

It is an amenable number.

6681197 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681197 is an equidigital number, since it uses as much as digits as its factorization.

6681197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 6681197 is about 2584.8011528936. The cubic root of 6681197 is about 188.3438422274.

The spelling of 6681197 in words is "six million, six hundred eighty-one thousand, one hundred ninety-seven".