5666683501685 has 4 divisors (see below), whose sum is σ = 6800020202028. Its totient is φ = 4533346801344.

The previous prime is 5666683501669. The next prime is 5666683501723. The reversal of 5666683501685 is 5861053866665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 955500385009 + 4711183116676 = 977497^2 + 2170526^2 .

It is a cyclic number.

It is not a de Polignac number, because 5666683501685 - 2⁴ = 5666683501669 is a prime.

It is a super-2 number, since 2×5666683501685² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566668350164 + ... + 566668350173.

It is an arithmetic number, because the mean of its divisors is an integer number (1700005050507).

Almost surely, 2^{5666683501685} is an apocalyptic number.

It is an amenable number.

5666683501685 is a deficient number, since it is larger than the sum of its proper divisors (1133336700343).

5666683501685 is a wasteful number, since it uses less digits than its factorization.

5666683501685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133336700342.

The product of its (nonzero) digits is 186624000, while the sum is 65.

The spelling of 5666683501685 in words is "five trillion, six hundred sixty-six billion, six hundred eighty-three million, five hundred one thousand, six hundred eighty-five".