5666881 has 8 divisors (see below), whose sum is σ = 6208128. Its totient is φ = 5130000.

The previous prime is 5666873. The next prime is 5666887. The reversal of 5666881 is 1886665.

It is a happy number.

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 5666881 - 2³ = 5666873 is a prime.

It is a super-2 number, since 2×5666881² = 64227080536322, which contains 22 as substring.

It is a Duffinian number.

5666881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5666887) 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, 2031 + ... + 3931.

It is an arithmetic number, because the mean of its divisors is an integer number (776016).

Almost surely, 2^5666881 is an apocalyptic number.

It is an amenable number.

5666881 is a deficient number, since it is larger than the sum of its proper divisors (541247).

5666881 is a wasteful number, since it uses less digits than its factorization.

5666881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183.

The product of its digits is 69120, while the sum is 40.

The square root of 5666881 is about 2380.5211614266. The cubic root of 5666881 is about 178.2849557734.

It can be divided in two parts, 566 and 6881, that added together give a palindrome (7447).

The spelling of 5666881 in words is "five million, six hundred sixty-six thousand, eight hundred eighty-one".