66681468059 has 2 divisors, whose sum is σ = 66681468060. Its totient is φ = 66681468058.

The previous prime is 66681468037. The next prime is 66681468209. The reversal of 66681468059 is 95086418666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66681468059 - 2¹⁶ = 66681402523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66681467989 and 66681468007.

It is not a weakly prime, because it can be changed into another prime (66681438059) 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, 33340734029 + 33340734030.

It is an arithmetic number, because the mean of its divisors is an integer number (33340734030).

Almost surely, 2^66681468059 is an apocalyptic number.

66681468059 is a deficient number, since it is larger than the sum of its proper divisors (1).

66681468059 is an equidigital number, since it uses as much as digits as its factorization.

66681468059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 66681468059 in words is "sixty-six billion, six hundred eighty-one million, four hundred sixty-eight thousand, fifty-nine".