5666641 has 2 divisors, whose sum is σ = 5666642. Its totient is φ = 5666640.

The previous prime is 5666623. The next prime is 5666677. The reversal of 5666641 is 1466665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4410000 + 1256641 = 2100^2 + 1121^2 .

It is a cyclic number.

It is not a de Polignac number, because 5666641 - 2¹⁹ = 5142353 is a prime.

It is a super-2 number, since 2×5666641² = 64221640445762, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 5666597 and 5666606.

It is not a weakly prime, because it can be changed into another prime (5666621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2833320 + 2833321.

It is an arithmetic number, because the mean of its divisors is an integer number (2833321).

Almost surely, 2^5666641 is an apocalyptic number.

It is an amenable number.

5666641 is a deficient number, since it is larger than the sum of its proper divisors (1).

5666641 is an equidigital number, since it uses as much as digits as its factorization.

5666641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 5666641 is about 2380.4707517632. The cubic root of 5666641 is about 178.2824388690.

It can be divided in two parts, 566664 and 1, that added together give a palindrome (566665).

The spelling of 5666641 in words is "five million, six hundred sixty-six thousand, six hundred forty-one".