18366065507 has 2 divisors, whose sum is σ = 18366065508. Its totient is φ = 18366065506.

The previous prime is 18366065491. The next prime is 18366065521. The reversal of 18366065507 is 70556066381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18366065507 - 2⁴ = 18366065491 is a prime.

It is not a weakly prime, because it can be changed into another prime (18366065407) 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, 9183032753 + 9183032754.

It is an arithmetic number, because the mean of its divisors is an integer number (9183032754).

Almost surely, 2^18366065507 is an apocalyptic number.

18366065507 is a deficient number, since it is larger than the sum of its proper divisors (1).

18366065507 is an equidigital number, since it uses as much as digits as its factorization.

18366065507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 18366065507 in words is "eighteen billion, three hundred sixty-six million, sixty-five thousand, five hundred seven".