18066674137 has 2 divisors, whose sum is σ = 18066674138. Its totient is φ = 18066674136.

The previous prime is 18066674089. The next prime is 18066674141. The reversal of 18066674137 is 73147666081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12067242201 + 5999431936 = 109851^2 + 77456^2 .

It is a cyclic number.

It is not a de Polignac number, because 18066674137 - 2⁷ = 18066674009 is a prime.

It is not a weakly prime, because it can be changed into another prime (18066674177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9033337068 + 9033337069.

It is an arithmetic number, because the mean of its divisors is an integer number (9033337069).

Almost surely, 2^18066674137 is an apocalyptic number.

It is an amenable number.

18066674137 is a deficient number, since it is larger than the sum of its proper divisors (1).

18066674137 is an equidigital number, since it uses as much as digits as its factorization.

18066674137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 18066674137 in words is "eighteen billion, sixty-six million, six hundred seventy-four thousand, one hundred thirty-seven".