660868185113 has 2 divisors, whose sum is σ = 660868185114. Its totient is φ = 660868185112.

The previous prime is 660868185041. The next prime is 660868185139. The reversal of 660868185113 is 311581868066.

660868185113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534606644224 + 126261540889 = 731168^2 + 355333^2 .

It is a cyclic number.

It is not a de Polignac number, because 660868185113 - 2¹⁴ = 660868168729 is a prime.

It is not a weakly prime, because it can be changed into another prime (660868185163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330434092556 + 330434092557.

It is an arithmetic number, because the mean of its divisors is an integer number (330434092557).

Almost surely, 2^660868185113 is an apocalyptic number.

It is an amenable number.

660868185113 is a deficient number, since it is larger than the sum of its proper divisors (1).

660868185113 is an equidigital number, since it uses as much as digits as its factorization.

660868185113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 660868185113 in words is "six hundred sixty billion, eight hundred sixty-eight million, one hundred eighty-five thousand, one hundred thirteen".