11056566761 has 2 divisors, whose sum is σ = 11056566762. Its totient is φ = 11056566760.

The previous prime is 11056566721. The next prime is 11056566769. The reversal of 11056566761 is 16766565011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10968582361 + 87984400 = 104731^2 + 9380^2 .

It is a cyclic number.

It is not a de Polignac number, because 11056566761 - 2¹⁴ = 11056550377 is a prime.

It is a super-2 number, since 2×11056566761² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11056566769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5528283380 + 5528283381.

It is an arithmetic number, because the mean of its divisors is an integer number (5528283381).

Almost surely, 2^11056566761 is an apocalyptic number.

It is an amenable number.

11056566761 is a deficient number, since it is larger than the sum of its proper divisors (1).

11056566761 is an equidigital number, since it uses as much as digits as its factorization.

11056566761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 11056566761 in words is "eleven billion, fifty-six million, five hundred sixty-six thousand, seven hundred sixty-one".