566666666666665 has 8 divisors (see below), whose sum is σ = 680137179775560. Its totient is φ = 453241880149632.

The previous prime is 566666666666651. The next prime is 566666666666677.

566666666666665 is nontrivially palindromic in base 10.

566666666666665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 247870891015056 + 318795775651609 = 15743916^2 + 17854853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 566666666666665 - 2²⁵ = 566666633112233 is a prime.

It is a super-2 number, since 2×566666666666665² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11431620700 + ... + 11431670269.

It is an arithmetic number, because the mean of its divisors is an integer number (85017147471945).

Almost surely, 2^{566666666666665} is an apocalyptic number.

It is an amenable number.

566666666666665 is a deficient number, since it is larger than the sum of its proper divisors (113470513108895).

566666666666665 is a wasteful number, since it uses less digits than its factorization.

566666666666665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22863295931.

The product of its digits is 326517350400, while the sum is 88.

The spelling of 566666666666665 in words is "five hundred sixty-six trillion, six hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-five".