66306118331 has 2 divisors, whose sum is σ = 66306118332. Its totient is φ = 66306118330.

The previous prime is 66306118327. The next prime is 66306118339. The reversal of 66306118331 is 13381160366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66306118331 - 2² = 66306118327 is a prime.

It is a super-2 number, since 2×66306118331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66306118339) 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, 33153059165 + 33153059166.

It is an arithmetic number, because the mean of its divisors is an integer number (33153059166).

Almost surely, 2^66306118331 is an apocalyptic number.

66306118331 is a deficient number, since it is larger than the sum of its proper divisors (1).

66306118331 is an equidigital number, since it uses as much as digits as its factorization.

66306118331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

Adding to 66306118331 its reverse (13381160366), we get a palindrome (79687278697).

The spelling of 66306118331 in words is "sixty-six billion, three hundred six million, one hundred eighteen thousand, three hundred thirty-one".