5666115166661 has 8 divisors (see below), whose sum is σ = 6169998367200. Its totient is φ = 5182798627440.

The previous prime is 5666115166637. The next prime is 5666115166667. The reversal of 5666115166661 is 1666615116665.

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 5666115166661 - 2⁶ = 5666115166597 is a prime.

It is a super-2 number, since 2×5666115166661² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5666115166597 and 5666115166606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5666115166667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5141664755 + ... + 5141665856.

It is an arithmetic number, because the mean of its divisors is an integer number (771249795900).

Almost surely, 2^{5666115166661} is an apocalyptic number.

It is an amenable number.

5666115166661 is a deficient number, since it is larger than the sum of its proper divisors (503883200539).

5666115166661 is a wasteful number, since it uses less digits than its factorization.

5666115166661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10283330659.

The product of its digits is 6998400, while the sum is 56.

The spelling of 5666115166661 in words is "five trillion, six hundred sixty-six billion, one hundred fifteen million, one hundred sixty-six thousand, six hundred sixty-one".