66127872166 has 64 divisors (see below), whose sum is σ = 104873978880. Its totient is φ = 31231549440.

The previous prime is 66127872163. The next prime is 66127872197.

66127872166 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66127872163) 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 in 31 ways as a sum of consecutive naturals, for example, 335674380 + ... + 335674576.

It is an arithmetic number, because the mean of its divisors is an integer number (1638655920).

Almost surely, 2^66127872166 is an apocalyptic number.

66127872166 is a deficient number, since it is larger than the sum of its proper divisors (38746106714).

66127872166 is a wasteful number, since it uses less digits than its factorization.

66127872166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

The product of its digits is 2032128, while the sum is 52.

The spelling of 66127872166 in words is "sixty-six billion, one hundred twenty-seven million, eight hundred seventy-two thousand, one hundred sixty-six".