6778998776 has 32 divisors (see below), whose sum is σ = 14061444480. Its totient is φ = 3037960800.

The previous prime is 6778998773. The next prime is 6778998823.

6778998776 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778998773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536246 + ... + 548741.

It is an arithmetic number, because the mean of its divisors is an integer number (439420140).

Almost surely, 2^6778998776 is an apocalyptic number.

It is an amenable number.

6778998776 is an abundant number, since it is smaller than the sum of its proper divisors (7282445704).

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

6778998776 is a wasteful number, since it uses less digits than its factorization.

6778998776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085075 (or 1085071 counting only the distinct ones).

The product of its digits is 448084224, while the sum is 74.

The square root of 6778998776 is about 82334.6754168619. The cubic root of 6778998776 is about 1892.5840912594.

The spelling of 6778998776 in words is "six billion, seven hundred seventy-eight million, nine hundred ninety-eight thousand, seven hundred seventy-six".