66065117167172 has 6 divisors (see below), whose sum is σ = 115613955042558. Its totient is φ = 33032558583584.

The previous prime is 66065117167163. The next prime is 66065117167237. The reversal of 66065117167172 is 27176171156066.

It can be written as a sum of positive squares in only one way, i.e., 39624809190976 + 26440307976196 = 6294824^2 + 5142014^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8258139645893 + ... + 8258139645900.

It is an arithmetic number, because the mean of its divisors is an integer number (19268992507093).

Almost surely, 2^{66065117167172} is an apocalyptic number.

It is an amenable number.

66065117167172 is a deficient number, since it is larger than the sum of its proper divisors (49548837875386).

66065117167172 is a wasteful number, since it uses less digits than its factorization.

66065117167172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16516279291797 (or 16516279291795 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 56.

The spelling of 66065117167172 in words is "sixty-six trillion, sixty-five billion, one hundred seventeen million, one hundred sixty-seven thousand, one hundred seventy-two".