127172066220166 has 64 divisors (see below), whose sum is σ = 219149780553216. Its totient is φ = 54784373529600.

The previous prime is 127172066220163. The next prime is 127172066220193. The reversal of 127172066220166 is 661022660271721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127172066220163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25775581 + ... + 30310471.

It is an arithmetic number, because the mean of its divisors is an integer number (3424215321144).

Almost surely, 2^{127172066220166} is an apocalyptic number.

127172066220166 is a deficient number, since it is larger than the sum of its proper divisors (91977714333050).

127172066220166 is a wasteful number, since it uses less digits than its factorization.

127172066220166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535437.

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

The spelling of 127172066220166 in words is "one hundred twenty-seven trillion, one hundred seventy-two billion, sixty-six million, two hundred twenty thousand, one hundred sixty-six".