5666604066665 has 16 divisors (see below), whose sum is σ = 7096580270208. Its totient is φ = 4335568909056.

The previous prime is 5666604066601. The next prime is 5666604066667.

5666604066665 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 5666604066665 - 2⁶ = 5666604066601 is a prime.

It is a super-2 number, since 2×5666604066665² (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 = 5666604066598 and 5666604066607.

It is not an unprimeable number, because it can be changed into a prime (5666604066667) 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, 2679647 + ... + 4302756.

It is an arithmetic number, because the mean of its divisors is an integer number (443536266888).

Almost surely, 2^{5666604066665} is an apocalyptic number.

It is an amenable number.

5666604066665 is a deficient number, since it is larger than the sum of its proper divisors (1429976203543).

5666604066665 is a wasteful number, since it uses less digits than its factorization.

5666604066665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6989488.

The product of its (nonzero) digits is 167961600, while the sum is 62.

The spelling of 5666604066665 in words is "five trillion, six hundred sixty-six billion, six hundred four million, sixty-six thousand, six hundred sixty-five".