566011681 has 9 divisors (see below), whose sum is σ = 582628851. Its totient is φ = 549857592.

The previous prime is 566011673. The next prime is 566011697. The reversal of 566011681 is 186110665.

The square root of 566011681 is 23791.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 506475025 + 59536656 = 22505^2 + 7716^2 .

It is not a de Polignac number, because 566011681 - 2³ = 566011673 is a prime.

It is a super-2 number, since 2×566011681² = 640738446056891522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566011631) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 879946 + ... + 880588.

It is an arithmetic number, because the mean of its divisors is an integer number (64736539).

Almost surely, 2^566011681 is an apocalyptic number.

566011681 is the 23791-st square number.

566011681 is the 11896-th centered octagonal number.

It is an amenable number.

566011681 is a deficient number, since it is larger than the sum of its proper divisors (16617170).

566011681 is an frugal number, since it uses more digits than its factorization.

566011681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The cubic root of 566011681 is about 827.1960742563.

The spelling of 566011681 in words is "five hundred sixty-six million, eleven thousand, six hundred eighty-one".