66500556163 has 2 divisors, whose sum is σ = 66500556164. Its totient is φ = 66500556162.

The previous prime is 66500556127. The next prime is 66500556181. The reversal of 66500556163 is 36165500566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66500556163 is a prime.

It is not a weakly prime, because it can be changed into another prime (66500550163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33250278081 + 33250278082.

It is an arithmetic number, because the mean of its divisors is an integer number (33250278082).

Almost surely, 2^66500556163 is an apocalyptic number.

66500556163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66500556163 is an equidigital number, since it uses as much as digits as its factorization.

66500556163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 66500556163 in words is "sixty-six billion, five hundred million, five hundred fifty-six thousand, one hundred sixty-three".