5668666 has 8 divisors (see below), whose sum is σ = 8540820. Its totient is φ = 2821728.

The previous prime is 5668639. The next prime is 5668673. The reversal of 5668666 is 6668665.

It can be written as a sum of positive squares in 2 ways, for example, as 5659641 + 9025 = 2379^2 + 95^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 5731 + ... + 6646.

Almost surely, 2^5668666 is an apocalyptic number.

5668666 is a deficient number, since it is larger than the sum of its proper divisors (2872154).

5668666 is a wasteful number, since it uses less digits than its factorization.

5668666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12608.

The product of its digits is 311040, while the sum is 43.

The square root of 5668666 is about 2380.8960498098. The cubic root of 5668666 is about 178.3036730206.

Subtracting 5668666 from its reverse (6668665), we obtain a palindrome (999999).

The spelling of 5668666 in words is "five million, six hundred sixty-eight thousand, six hundred sixty-six".