66118578307 has 2 divisors, whose sum is σ = 66118578308. Its totient is φ = 66118578306.

The previous prime is 66118578293. The next prime is 66118578313. The reversal of 66118578307 is 70387581166.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66118578307 is a prime.

It is not a weakly prime, because it can be changed into another prime (66118578347) 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, 33059289153 + 33059289154.

It is an arithmetic number, because the mean of its divisors is an integer number (33059289154).

Almost surely, 2^66118578307 is an apocalyptic number.

66118578307 is a deficient number, since it is larger than the sum of its proper divisors (1).

66118578307 is an equidigital number, since it uses as much as digits as its factorization.

66118578307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 66118578307 in words is "sixty-six billion, one hundred eighteen million, five hundred seventy-eight thousand, three hundred seven".