11660666573 has 2 divisors, whose sum is σ = 11660666574. Its totient is φ = 11660666572.

The previous prime is 11660666557. The next prime is 11660666593. The reversal of 11660666573 is 37566606611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10289667844 + 1370998729 = 101438^2 + 37027^2 .

It is a cyclic number.

It is not a de Polignac number, because 11660666573 - 2⁴ = 11660666557 is a prime.

It is a super-2 number, since 2×11660666573² (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 (11660666593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830333286 + 5830333287.

It is an arithmetic number, because the mean of its divisors is an integer number (5830333287).

Almost surely, 2^11660666573 is an apocalyptic number.

It is an amenable number.

11660666573 is a deficient number, since it is larger than the sum of its proper divisors (1).

11660666573 is an equidigital number, since it uses as much as digits as its factorization.

11660666573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 11660666573 in words is "eleven billion, six hundred sixty million, six hundred sixty-six thousand, five hundred seventy-three".