6787687845 has 16 divisors (see below), whose sum is σ = 10961801280. Its totient is φ = 3586266624.

The previous prime is 6787687817. The next prime is 6787687861. The reversal of 6787687845 is 5487867876.

It is not a de Polignac number, because 6787687845 - 2²⁰ = 6786639269 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2112940 + ... + 2116149.

It is an arithmetic number, because the mean of its divisors is an integer number (685112580).

Almost surely, 2^6787687845 is an apocalyptic number.

It is an amenable number.

6787687845 is a deficient number, since it is larger than the sum of its proper divisors (4174113435).

6787687845 is a wasteful number, since it uses less digits than its factorization.

6787687845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229204.

The product of its digits is 126443520, while the sum is 66.

The square root of 6787687845 is about 82387.4252844450. The cubic root of 6787687845 is about 1893.3923607001.

The spelling of 6787687845 in words is "six billion, seven hundred eighty-seven million, six hundred eighty-seven thousand, eight hundred forty-five".