566666666 has 8 divisors (see below), whose sum is σ = 850999044. Its totient is φ = 283000320.

The previous prime is 566666651. The next prime is 566666677. The reversal of 566666666 is 666666665.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 452625625 + 114041041 = 21275^2 + 10679^2 .

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

It is a super-2 number, since 2×566666666² = 642222220711111112, which contains 22 as substring.

566666666 is a modest number, since divided by 66666 gives 5666 as remainder.

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, 164375 + ... + 167786.

Almost surely, 2^566666666 is an apocalyptic number.

566666666 is a deficient number, since it is larger than the sum of its proper divisors (284332378).

566666666 is a wasteful number, since it uses less digits than its factorization.

566666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333016.

The product of its digits is 8398080, while the sum is 53.

The square root of 566666666 is about 23804.7614144734. The cubic root of 566666666 is about 827.5150265463.

Subtracting 566666666 from its reverse (666666665), we obtain a palindrome (99999999).

The spelling of 566666666 in words is "five hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-six".