6565116666667 has 16 divisors (see below), whose sum is σ = 7141667097600. Its totient is φ = 5998999007232.

The previous prime is 6565116666649. The next prime is 6565116666671. The reversal of 6565116666667 is 7666666115656.

It is a cyclic number.

It is not a de Polignac number, because 6565116666667 - 2³⁵ = 6530756928299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6565116666167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3686818 + ... + 5169415.

It is an arithmetic number, because the mean of its divisors is an integer number (446354193600).

Almost surely, 2^{6565116666667} is an apocalyptic number.

6565116666667 is a deficient number, since it is larger than the sum of its proper divisors (576550430933).

6565116666667 is a wasteful number, since it uses less digits than its factorization.

6565116666667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856822.

The product of its digits is 293932800, while the sum is 67.

The spelling of 6565116666667 in words is "six trillion, five hundred sixty-five billion, one hundred sixteen million, six hundred sixty-six thousand, six hundred sixty-seven".