18066674009 has 2 divisors, whose sum is σ = 18066674010. Its totient is φ = 18066674008.

The previous prime is 18066673991. The next prime is 18066674057. The reversal of 18066674009 is 90047666081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9258288400 + 8808385609 = 96220^2 + 93853^2 .

It is a cyclic number.

It is not a de Polignac number, because 18066674009 - 2⁸ = 18066673753 is a prime.

It is a super-2 number, since 2×18066674009² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18066674089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9033337004 + 9033337005.

It is an arithmetic number, because the mean of its divisors is an integer number (9033337005).

Almost surely, 2^18066674009 is an apocalyptic number.

It is an amenable number.

18066674009 is a deficient number, since it is larger than the sum of its proper divisors (1).

18066674009 is an equidigital number, since it uses as much as digits as its factorization.

18066674009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 18066674009 in words is "eighteen billion, sixty-six million, six hundred seventy-four thousand, nine".