6778668776 has 48 divisors (see below), whose sum is σ = 13981558500. Its totient is φ = 3078775040.

The previous prime is 6778668773. The next prime is 6778668797.

6778668776 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 6744679876 + 33988900 = 82126^2 + 5830^2 .

It is not an unprimeable number, because it can be changed into a prime (6778668773) 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 11 ways as a sum of consecutive naturals, for example, 1884836 + ... + 1888428.

Almost surely, 2^6778668776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6778668776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6990779250).

6778668776 is an abundant number, since it is smaller than the sum of its proper divisors (7202889724).

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

6778668776 is a wasteful number, since it uses less digits than its factorization.

6778668776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5570 (or 5555 counting only the distinct ones).

The product of its digits is 199148544, while the sum is 68.

The square root of 6778668776 is about 82332.6713765562. The cubic root of 6778668776 is about 1892.5533805844.

The spelling of 6778668776 in words is "six billion, seven hundred seventy-eight million, six hundred sixty-eight thousand, seven hundred seventy-six".