566807666 has 8 divisors (see below), whose sum is σ = 858976860. Its totient is φ = 280482048.

The previous prime is 566807651. The next prime is 566807687. The reversal of 566807666 is 666708665.

It can be written as a sum of positive squares in 2 ways, for example, as 508728025 + 58079641 = 22555^2 + 7621^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1460651 + ... + 1461038.

Almost surely, 2^566807666 is an apocalyptic number.

566807666 is a deficient number, since it is larger than the sum of its proper divisors (292169194).

566807666 is a wasteful number, since it uses less digits than its factorization.

566807666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921788.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The square root of 566807666 is about 23807.7228226473. The cubic root of 566807666 is about 827.5836559243.

Subtracting 566807666 from its reverse (666708665), we obtain a palindrome (99900999).

It can be divided in two parts, 56680 and 7666, that added together give a palindrome (64346).

The spelling of 566807666 in words is "five hundred sixty-six million, eight hundred seven thousand, six hundred sixty-six".