66184368987329 has 2 divisors, whose sum is σ = 66184368987330. Its totient is φ = 66184368987328.

The previous prime is 66184368987283. The next prime is 66184368987377. The reversal of 66184368987329 is 92378986348166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53321759730625 + 12862609256704 = 7302175^2 + 3586448^2 .

It is a cyclic number.

It is not a de Polignac number, because 66184368987329 - 2¹² = 66184368983233 is a prime.

It is not a weakly prime, because it can be changed into another prime (66184368987629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33092184493664 + 33092184493665.

It is an arithmetic number, because the mean of its divisors is an integer number (33092184493665).

Almost surely, 2^{66184368987329} is an apocalyptic number.

It is an amenable number.

66184368987329 is a deficient number, since it is larger than the sum of its proper divisors (1).

66184368987329 is an equidigital number, since it uses as much as digits as its factorization.

66184368987329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4514807808, while the sum is 80.

The spelling of 66184368987329 in words is "sixty-six trillion, one hundred eighty-four billion, three hundred sixty-eight million, nine hundred eighty-seven thousand, three hundred twenty-nine".