6565116666666 has 32 divisors (see below), whose sum is σ = 13162127969088. Its totient is φ = 2183057009280.

The previous prime is 6565116666649. The next prime is 6565116666671. The reversal of 6565116666666 is 6666666115656.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6565116666597 and 6565116666606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55884646 + ... + 56001998.

It is an arithmetic number, because the mean of its divisors is an integer number (411316499034).

Almost surely, 2^{6565116666666} is an apocalyptic number.

6565116666666 is an abundant number, since it is smaller than the sum of its proper divisors (6597011302422).

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

6565116666666 is a wasteful number, since it uses less digits than its factorization.

6565116666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139926.

The product of its digits is 251942400, while the sum is 66.

The spelling of 6565116666666 in words is "six trillion, five hundred sixty-five billion, one hundred sixteen million, six hundred sixty-six thousand, six hundred sixty-six".