6778448776 has 16 divisors (see below), whose sum is σ = 13865009040. Its totient is φ = 3081113040.

The previous prime is 6778448767. The next prime is 6778448783.

6778448776 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38513826 + ... + 38514001.

It is an arithmetic number, because the mean of its divisors is an integer number (866563065).

Almost surely, 2^6778448776 is an apocalyptic number.

It is an amenable number.

6778448776 is an abundant number, since it is smaller than the sum of its proper divisors (7086560264).

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

6778448776 is a wasteful number, since it uses less digits than its factorization.

6778448776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77027844 (or 77027840 counting only the distinct ones).

The product of its digits is 88510464, while the sum is 64.

The square root of 6778448776 is about 82331.3353225854. The cubic root of 6778448776 is about 1892.5329062473.

It can be divided in two parts, 6778 and 448776, that added together give a palindrome (455554).

The spelling of 6778448776 in words is "six billion, seven hundred seventy-eight million, four hundred forty-eight thousand, seven hundred seventy-six".