6778895785 has 8 divisors (see below), whose sum is σ = 8170198920. Its totient is φ = 5399433984.

The previous prime is 6778895737. The next prime is 6778895789. The reversal of 6778895785 is 5875988776.

It can be written as a sum of positive squares in 4 ways, for example, as 958273936 + 5820621849 = 30956^2 + 76293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6778895785 - 2⁹ = 6778895273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6778895789) 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 7 ways as a sum of consecutive naturals, for example, 2959072 + ... + 2961361.

It is an arithmetic number, because the mean of its divisors is an integer number (1021274865).

Almost surely, 2^6778895785 is an apocalyptic number.

It is an amenable number.

6778895785 is a deficient number, since it is larger than the sum of its proper divisors (1391303135).

6778895785 is a wasteful number, since it uses less digits than its factorization.

6778895785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5920667.

The product of its digits is 237081600, while the sum is 70.

The square root of 6778895785 is about 82334.0499732644. The cubic root of 6778895785 is about 1892.5745067508.

The spelling of 6778895785 in words is "six billion, seven hundred seventy-eight million, eight hundred ninety-five thousand, seven hundred eighty-five".