6778365766 has 32 divisors (see below), whose sum is σ = 10844720640. Its totient is φ = 3166464000.

The previous prime is 6778365751. The next prime is 6778365773. The reversal of 6778365766 is 6675638776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4551550 + ... + 4553038.

It is an arithmetic number, because the mean of its divisors is an integer number (338897520).

Almost surely, 2^6778365766 is an apocalyptic number.

6778365766 is a deficient number, since it is larger than the sum of its proper divisors (4066354874).

6778365766 is a wasteful number, since it uses less digits than its factorization.

6778365766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400.

The product of its digits is 53343360, while the sum is 61.

The square root of 6778365766 is about 82330.8311994966. The cubic root of 6778365766 is about 1892.5251807926.

The spelling of 6778365766 in words is "six billion, seven hundred seventy-eight million, three hundred sixty-five thousand, seven hundred sixty-six".