566551261 has 2 divisors, whose sum is σ = 566551262. Its totient is φ = 566551260.

The previous prime is 566551213. The next prime is 566551283. The reversal of 566551261 is 162155665.

566551261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286624900 + 279926361 = 16930^2 + 16731^2 .

It is a cyclic number.

It is not a de Polignac number, because 566551261 - 2⁹ = 566550749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 566551261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566551211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283275630 + 283275631.

It is an arithmetic number, because the mean of its divisors is an integer number (283275631).

Almost surely, 2^566551261 is an apocalyptic number.

It is an amenable number.

566551261 is a deficient number, since it is larger than the sum of its proper divisors (1).

566551261 is an equidigital number, since it uses as much as digits as its factorization.

566551261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 37.

The square root of 566551261 is about 23802.3373011980. The cubic root of 566551261 is about 827.4588466313.

The spelling of 566551261 in words is "five hundred sixty-six million, five hundred fifty-one thousand, two hundred sixty-one".