6778638873 has 48 divisors (see below), whose sum is σ = 10825032960. Its totient is φ = 4189872096.

The previous prime is 6778638863. The next prime is 6778638883. The reversal of 6778638873 is 3788368776.

It is an interprime number because it is at equal distance from previous prime (6778638863) and next prime (6778638883).

It is not a de Polignac number, because 6778638873 - 2⁴ = 6778638857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6778638873.

It is not an unprimeable number, because it can be changed into a prime (6778638863) 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 in 47 ways as a sum of consecutive naturals, for example, 450711 + ... + 465507.

It is an arithmetic number, because the mean of its divisors is an integer number (225521520).

Almost surely, 2^6778638873 is an apocalyptic number.

It is an amenable number.

6778638873 is a deficient number, since it is larger than the sum of its proper divisors (4046394087).

6778638873 is a wasteful number, since it uses less digits than its factorization.

6778638873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14891 (or 14866 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 63.

The square root of 6778638873 is about 82332.4897777299. The cubic root of 6778638873 is about 1892.5505976827.

The spelling of 6778638873 in words is "six billion, seven hundred seventy-eight million, six hundred thirty-eight thousand, eight hundred seventy-three".