6867777687 has 4 divisors (see below), whose sum is σ = 9157036920. Its totient is φ = 4578518456.

The previous prime is 6867777661. The next prime is 6867777703. The reversal of 6867777687 is 7867777686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6867777687 - 2¹¹ = 6867775639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6867779687) 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 in 3 ways as a sum of consecutive naturals, for example, 1144629612 + ... + 1144629617.

It is an arithmetic number, because the mean of its divisors is an integer number (2289259230).

Almost surely, 2^6867777687 is an apocalyptic number.

6867777687 is a deficient number, since it is larger than the sum of its proper divisors (2289259233).

6867777687 is a wasteful number, since it uses less digits than its factorization.

6867777687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289259232.

The product of its digits is 232339968, while the sum is 69.

The square root of 6867777687 is about 82872.0561287096. The cubic root of 6867777687 is about 1900.8101519202.

Subtracting 6867777687 from its reverse (7867777686), we obtain a palindrome (999999999).

The spelling of 6867777687 in words is "six billion, eight hundred sixty-seven million, seven hundred seventy-seven thousand, six hundred eighty-seven".