5666658566665 has 8 divisors (see below), whose sum is σ = 6800003198208. Its totient is φ = 4533318241200.

The previous prime is 5666658566629. The next prime is 5666658566707.

5666658566665 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 5666658566665 - 2¹⁵ = 5666658533897 is a prime.

It is a super-3 number, since 3×5666658566665³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5666658566591 and 5666658566600.

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, 3965064 + ... + 5201446.

It is an arithmetic number, because the mean of its divisors is an integer number (850000399776).

Almost surely, 2^{5666658566665} is an apocalyptic number.

It is an amenable number.

5666658566665 is a deficient number, since it is larger than the sum of its proper divisors (1133344631543).

5666658566665 is a wasteful number, since it uses less digits than its factorization.

5666658566665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153039.

The product of its digits is 8398080000, while the sum is 76.

The spelling of 5666658566665 in words is "five trillion, six hundred sixty-six billion, six hundred fifty-eight million, five hundred sixty-six thousand, six hundred sixty-five".