6681287 has 2 divisors, whose sum is σ = 6681288. Its totient is φ = 6681286.

The previous prime is 6681239. The next prime is 6681329. The reversal of 6681287 is 7821866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6681287 - 2¹² = 6677191 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6681287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6681487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340643 + 3340644.

It is an arithmetic number, because the mean of its divisors is an integer number (3340644).

Almost surely, 2^6681287 is an apocalyptic number.

6681287 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681287 is an equidigital number, since it uses as much as digits as its factorization.

6681287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 6681287 is about 2584.8185622979. The cubic root of 6681287 is about 188.3446879276.

The spelling of 6681287 in words is "six million, six hundred eighty-one thousand, two hundred eighty-seven".