10966566581 has 2 divisors, whose sum is σ = 10966566582. Its totient is φ = 10966566580.

The previous prime is 10966566563. The next prime is 10966566593. The reversal of 10966566581 is 18566566901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10228085956 + 738480625 = 101134^2 + 27175^2 .

It is an emirp because it is prime and its reverse (18566566901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10966566581 - 2³⁰ = 9892824757 is a prime.

It is a super-2 number, since 2×10966566581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10966566511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5483283290 + 5483283291.

It is an arithmetic number, because the mean of its divisors is an integer number (5483283291).

Almost surely, 2^10966566581 is an apocalyptic number.

It is an amenable number.

10966566581 is a deficient number, since it is larger than the sum of its proper divisors (1).

10966566581 is an equidigital number, since it uses as much as digits as its factorization.

10966566581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 10966566581 in words is "ten billion, nine hundred sixty-six million, five hundred sixty-six thousand, five hundred eighty-one".