11660666593 has 2 divisors, whose sum is σ = 11660666594. Its totient is φ = 11660666592.

The previous prime is 11660666573. The next prime is 11660666663. The reversal of 11660666593 is 39566606611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11181582049 + 479084544 = 105743^2 + 21888^2 .

It is a cyclic number.

It is not a de Polignac number, because 11660666593 - 2⁹ = 11660666081 is a prime.

It is a super-2 number, since 2×11660666593² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11660666573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830333296 + 5830333297.

It is an arithmetic number, because the mean of its divisors is an integer number (5830333297).

Almost surely, 2^11660666593 is an apocalyptic number.

It is an amenable number.

11660666593 is a deficient number, since it is larger than the sum of its proper divisors (1).

11660666593 is an equidigital number, since it uses as much as digits as its factorization.

11660666593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 11660666593 in words is "eleven billion, six hundred sixty million, six hundred sixty-six thousand, five hundred ninety-three".