5666666 has 4 divisors (see below), whose sum is σ = 8500002. Its totient is φ = 2833332.

The previous prime is 5666641. The next prime is 5666677. The reversal of 5666666 is 6666665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5593225 + 73441 = 2365^2 + 271^2 .

It is a super-2 number, since 2×5666666² = 64222207111112, which contains 22 as substring.

5666666 is a modest number, since divided by 6666 gives 566 as remainder.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1416665 + ... + 1416668.

Almost surely, 2^5666666 is an apocalyptic number.

5666666 is a deficient number, since it is larger than the sum of its proper divisors (2833336).

5666666 is a wasteful number, since it uses less digits than its factorization.

5666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833335.

The product of its digits is 233280, while the sum is 41.

The square root of 5666666 is about 2380.4760028196. The cubic root of 5666666 is about 178.2827010498.

Subtracting 5666666 from its reverse (6666665), we obtain a palindrome (999999).

The spelling of 5666666 in words is "five million, six hundred sixty-six thousand, six hundred sixty-six".