6565776738 has 16 divisors (see below), whose sum is σ = 13215195840. Its totient is φ = 2174651856.

The previous prime is 6565776733. The next prime is 6565776739. The reversal of 6565776738 is 8376775656.

It is not an unprimeable number, because it can be changed into a prime (6565776733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3484078 + ... + 3485961.

It is an arithmetic number, because the mean of its divisors is an integer number (825949740).

Almost surely, 2^6565776738 is an apocalyptic number.

6565776738 is an abundant number, since it is smaller than the sum of its proper divisors (6649419102).

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

6565776738 is a wasteful number, since it uses less digits than its factorization.

6565776738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6970201.

The product of its digits is 44452800, while the sum is 60.

The square root of 6565776738 is about 81029.4806721603. The cubic root of 6565776738 is about 1872.5296522286.

The spelling of 6565776738 in words is "six billion, five hundred sixty-five million, seven hundred seventy-six thousand, seven hundred thirty-eight".