6866887 has 2 divisors, whose sum is σ = 6866888. Its totient is φ = 6866886.

The previous prime is 6866879. The next prime is 6866927. The reversal of 6866887 is 7886686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6866887 - 2³ = 6866879 is a prime.

6866887 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6866887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6866837) 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, 3433443 + 3433444.

It is an arithmetic number, because the mean of its divisors is an integer number (3433444).

Almost surely, 2^6866887 is an apocalyptic number.

6866887 is a deficient number, since it is larger than the sum of its proper divisors (1).

6866887 is an equidigital number, since it uses as much as digits as its factorization.

6866887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 49.

The square root of 6866887 is about 2620.4745753394. The cubic root of 6866887 is about 190.0727975892.

The spelling of 6866887 in words is "six million, eight hundred sixty-six thousand, eight hundred eighty-seven".