566666 has 8 divisors (see below), whose sum is σ = 853284. Its totient is φ = 282240.

The previous prime is 566659. The next prime is 566677. The reversal of 566666 is 666665.

It can be written as a sum of positive squares in 2 ways, for example, as 461041 + 105625 = 679^2 + 325^2 .

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

It is a super-2 number, since 2×566666² = 642220711112, which contains 22 as substring.

566666 is a modest number, since divided by 666 gives 566 as remainder.

It is a Curzon number.

It is a plaindrome in base 10.

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, 506 + ... + 1178.

2⁵⁶⁶⁶⁶⁶ is an apocalyptic number.

566666 is a deficient number, since it is larger than the sum of its proper divisors (286618).

566666 is a wasteful number, since it uses less digits than its factorization.

566666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096.

The product of its digits is 38880, while the sum is 35.

The square root of 566666 is about 752.7722099015. The cubic root of 566666 is about 82.7514702355.

Subtracting 566666 from its reverse (666665), we obtain a palindrome (99999).

The spelling of 566666 in words is "five hundred sixty-six thousand, six hundred sixty-six".