566980861 has 4 divisors (see below), whose sum is σ = 571060000. Its totient is φ = 562901724.

The previous prime is 566980849. The next prime is 566980873. The reversal of 566980861 is 168089665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168089665 = 5 ⋅33617933.

It is an interprime number because it is at equal distance from previous prime (566980849) and next prime (566980873).

It is a cyclic number.

It is not a de Polignac number, because 566980861 - 2¹⁵ = 566948093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566980891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2039361 + ... + 2039638.

It is an arithmetic number, because the mean of its divisors is an integer number (142765000).

Almost surely, 2^566980861 is an apocalyptic number.

It is an amenable number.

566980861 is a deficient number, since it is larger than the sum of its proper divisors (4079139).

566980861 is a wasteful number, since it uses less digits than its factorization.

566980861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4079138.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 566980861 is about 23811.3599149650. The cubic root of 566980861 is about 827.6679401024.

The spelling of 566980861 in words is "five hundred sixty-six million, nine hundred eighty thousand, eight hundred sixty-one".