5666213 has 6 divisors (see below), whose sum is σ = 6591366. Its totient is φ = 4856712.

The previous prime is 5666209. The next prime is 5666233. The reversal of 5666213 is 3126665.

It can be written as a sum of positive squares in only one way, i.e., 5303809 + 362404 = 2303^2 + 602^2 .

It is not a de Polignac number, because 5666213 - 2² = 5666209 is a prime.

It is a super-2 number, since 2×5666213² = 64211939522738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5666203) 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 in 5 ways as a sum of consecutive naturals, for example, 57770 + ... + 57867.

It is an arithmetic number, because the mean of its divisors is an integer number (1098561).

Almost surely, 2^5666213 is an apocalyptic number.

It is an amenable number.

5666213 is a deficient number, since it is larger than the sum of its proper divisors (925153).

5666213 is a wasteful number, since it uses less digits than its factorization.

5666213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115651 (or 115644 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 5666213 is about 2380.3808518806. The cubic root of 5666213 is about 178.2779502131.

The spelling of 5666213 in words is "five million, six hundred sixty-six thousand, two hundred thirteen".