10561066591 has 2 divisors, whose sum is σ = 10561066592. Its totient is φ = 10561066590.

The previous prime is 10561066513. The next prime is 10561066597. The reversal of 10561066591 is 19566016501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10561066591 - 2¹³ = 10561058399 is a prime.

It is a super-2 number, since 2×10561066591² (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 (10561066597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280533295 + 5280533296.

It is an arithmetic number, because the mean of its divisors is an integer number (5280533296).

Almost surely, 2^10561066591 is an apocalyptic number.

10561066591 is a deficient number, since it is larger than the sum of its proper divisors (1).

10561066591 is an equidigital number, since it uses as much as digits as its factorization.

10561066591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 10561066591 in words is "ten billion, five hundred sixty-one million, sixty-six thousand, five hundred ninety-one".