6808778064 has 60 divisors (see below), whose sum is σ = 20787410592. Its totient is φ = 2063265600.

The previous prime is 6808778063. The next prime is 6808778071. The reversal of 6808778064 is 4608778086.

It is a self number, because there is not a number n which added to its sum of digits gives 6808778064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6808778063) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2147652 + ... + 2150819.

Almost surely, 2^6808778064 is an apocalyptic number.

It is an amenable number.

6808778064 is an abundant number, since it is smaller than the sum of its proper divisors (13978632528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6808778064 is a wasteful number, since it uses less digits than its factorization.

6808778064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298496 (or 4298487 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The square root of 6808778064 is about 82515.3201775282. The cubic root of 6808778064 is about 1895.3513376831.

The spelling of 6808778064 in words is "six billion, eight hundred eight million, seven hundred seventy-eight thousand, sixty-four".