6887557867 has 2 divisors, whose sum is σ = 6887557868. Its totient is φ = 6887557866.

The previous prime is 6887557843. The next prime is 6887557889. The reversal of 6887557867 is 7687557886.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6887557867 is a prime.

It is not a weakly prime, because it can be changed into another prime (6887557267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3443778933 + 3443778934.

It is an arithmetic number, because the mean of its divisors is an integer number (3443778934).

Almost surely, 2^6887557867 is an apocalyptic number.

6887557867 is a deficient number, since it is larger than the sum of its proper divisors (1).

6887557867 is an equidigital number, since it uses as much as digits as its factorization.

6887557867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158054400, while the sum is 67.

The square root of 6887557867 is about 82991.3119971000. The cubic root of 6887557867 is about 1902.6332709400.

The spelling of 6887557867 in words is "six billion, eight hundred eighty-seven million, five hundred fifty-seven thousand, eight hundred sixty-seven".