66117271166 has 4 divisors (see below), whose sum is σ = 99175906752. Its totient is φ = 33058635582.

The previous prime is 66117271123. The next prime is 66117271183.

66117271166 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16529317790 + ... + 16529317793.

It is an arithmetic number, because the mean of its divisors is an integer number (24793976688).

Almost surely, 2^66117271166 is an apocalyptic number.

66117271166 is a deficient number, since it is larger than the sum of its proper divisors (33058635586).

66117271166 is a wasteful number, since it uses less digits than its factorization.

66117271166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33058635585.

The product of its digits is 127008, while the sum is 44.

The spelling of 66117271166 in words is "sixty-six billion, one hundred seventeen million, two hundred seventy-one thousand, one hundred sixty-six".