11666560511071 has 2 divisors, whose sum is σ = 11666560511072. Its totient is φ = 11666560511070.

The previous prime is 11666560511017. The next prime is 11666560511113. The reversal of 11666560511071 is 17011506566611.

Together with previous prime (11666560511017) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (17011506566611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11666560511071 - 2³⁹ = 11116804697183 is a prime.

It is a super-2 number, since 2×11666560511071² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11666560511471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833280255535 + 5833280255536.

It is an arithmetic number, because the mean of its divisors is an integer number (5833280255536).

Almost surely, 2^{11666560511071} is an apocalyptic number.

11666560511071 is a deficient number, since it is larger than the sum of its proper divisors (1).

11666560511071 is an equidigital number, since it uses as much as digits as its factorization.

11666560511071 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 46.

The spelling of 11666560511071 in words is "eleven trillion, six hundred sixty-six billion, five hundred sixty million, five hundred eleven thousand, seventy-one".