6777777777777 has 12 divisors (see below), whose sum is σ = 9797961842500. Its totient is φ = 4514900802048.

The previous prime is 6777777777721. The next prime is 6777777777833. The reversal of 6777777777777 is 7777777777776.

It is an interprime number because it is at equal distance from previous prime (6777777777721) and next prime (6777777777833).

It can be written as a sum of positive squares in 2 ways, for example, as 3469740700176 + 3308037077601 = 1862724^2 + 1818801^2 .

It is not a de Polignac number, because 6777777777777 - 2¹² = 6777777773681 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6777777777707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301464508 + ... + 301486989.

Almost surely, 2^{6777777777777} is an apocalyptic number.

It is an amenable number.

6777777777777 is a deficient number, since it is larger than the sum of its proper divisors (3020184064723).

6777777777777 is a wasteful number, since it uses less digits than its factorization.

6777777777777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602952752 (or 602952749 counting only the distinct ones).

The product of its digits is 83047723206, while the sum is 90.

Subtracting 6777777777777 from its reverse (7777777777776), we obtain a palindrome (999999999999).

The spelling of 6777777777777 in words is "six trillion, seven hundred seventy-seven billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, seven hundred seventy-seven".