18066674177 has 2 divisors, whose sum is σ = 18066674178. Its totient is φ = 18066674176.

The previous prime is 18066674161. The next prime is 18066674189. The reversal of 18066674177 is 77147666081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17057404816 + 1009269361 = 130604^2 + 31769^2 .

It is a cyclic number.

It is not a de Polignac number, because 18066674177 - 2⁴ = 18066674161 is a prime.

It is not a weakly prime, because it can be changed into another prime (18066674137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9033337088 + 9033337089.

It is an arithmetic number, because the mean of its divisors is an integer number (9033337089).

Almost surely, 2^18066674177 is an apocalyptic number.

It is an amenable number.

18066674177 is a deficient number, since it is larger than the sum of its proper divisors (1).

18066674177 is an equidigital number, since it uses as much as digits as its factorization.

18066674177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 18066674177 in words is "eighteen billion, sixty-six million, six hundred seventy-four thousand, one hundred seventy-seven".