566721143 has 2 divisors, whose sum is σ = 566721144. Its totient is φ = 566721142.

The previous prime is 566721139. The next prime is 566721157. The reversal of 566721143 is 341127665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 566721143 - 2² = 566721139 is a prime.

It is a super-3 number, since 3×566721143³ (a number of 27 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566021143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283360571 + 283360572.

It is an arithmetic number, because the mean of its divisors is an integer number (283360572).

Almost surely, 2^566721143 is an apocalyptic number.

566721143 is a deficient number, since it is larger than the sum of its proper divisors (1).

566721143 is an equidigital number, since it uses as much as digits as its factorization.

566721143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 566721143 is about 23805.9056328467. The cubic root of 566721143 is about 827.5415436590.

The spelling of 566721143 in words is "five hundred sixty-six million, seven hundred twenty-one thousand, one hundred forty-three".