66127872163 has 2 divisors, whose sum is σ = 66127872164. Its totient is φ = 66127872162.

The previous prime is 66127872101. The next prime is 66127872197. The reversal of 66127872163 is 36127872166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66127872163 - 2²¹ = 66125775011 is a prime.

It is not a weakly prime, because it can be changed into another prime (66127876163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33063936081 + 33063936082.

It is an arithmetic number, because the mean of its divisors is an integer number (33063936082).

Almost surely, 2^66127872163 is an apocalyptic number.

66127872163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66127872163 is an equidigital number, since it uses as much as digits as its factorization.

66127872163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The spelling of 66127872163 in words is "sixty-six billion, one hundred twenty-seven million, eight hundred seventy-two thousand, one hundred sixty-three".