6776218115689 has 27 divisors (see below), whose sum is σ = 7786912925239. Its totient is φ = 5891790893120.

The previous prime is 6776218115687. The next prime is 6776218115707. The reversal of 6776218115689 is 9865118126776.

The square root of 6776218115689 is 2603117.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6036274075689 + 739944040000 = 2456883^2 + 860200^2 .

It is not a de Polignac number, because 6776218115689 - 2¹ = 6776218115687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6776218115683) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 658583457 + ... + 658593745.

Almost surely, 2^{6776218115689} is an apocalyptic number.

6776218115689 is the 2603117-th square number.

6776218115689 is the 1301559-th centered octagonal number.

It is an amenable number.

6776218115689 is a deficient number, since it is larger than the sum of its proper divisors (1010694809550).

6776218115689 is an frugal number, since it uses more digits than its factorization.

6776218115689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20646 (or 10323 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 67.

The spelling of 6776218115689 in words is "six trillion, seven hundred seventy-six billion, two hundred eighteen million, one hundred fifteen thousand, six hundred eighty-nine".