66217871266 has 32 divisors (see below), whose sum is σ = 107458659072. Its totient is φ = 30483736320.

The previous prime is 66217871243. The next prime is 66217871273.

66217871266 is nontrivially palindromic in base 10.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 3780120 + ... + 3797596.

It is an arithmetic number, because the mean of its divisors is an integer number (3358083096).

Almost surely, 2^66217871266 is an apocalyptic number.

66217871266 is a deficient number, since it is larger than the sum of its proper divisors (41240787806).

66217871266 is a wasteful number, since it uses less digits than its factorization.

66217871266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19914.

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

The spelling of 66217871266 in words is "sixty-six billion, two hundred seventeen million, eight hundred seventy-one thousand, two hundred sixty-six".