11566662061111 has 2 divisors, whose sum is σ = 11566662061112. Its totient is φ = 11566662061110.

The previous prime is 11566662061091. The next prime is 11566662061121. The reversal of 11566662061111 is 11116026666511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11566662061111 - 2⁹ = 11566662060599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11566662061121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5783331030555 + 5783331030556.

It is an arithmetic number, because the mean of its divisors is an integer number (5783331030556).

Almost surely, 2^{11566662061111} is an apocalyptic number.

11566662061111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11566662061111 is an equidigital number, since it uses as much as digits as its factorization.

11566662061111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 11566662061111 in words is "eleven trillion, five hundred sixty-six billion, six hundred sixty-two million, sixty-one thousand, one hundred eleven".