66166161127 has 16 divisors (see below), whose sum is σ = 78600297600. Its totient is φ = 55020198240.

The previous prime is 66166161121. The next prime is 66166161143. The reversal of 66166161127 is 72116166166.

It is a cyclic number.

It is not a de Polignac number, because 66166161127 - 2³⁵ = 31806422759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66166161121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5452293 + ... + 5464414.

It is an arithmetic number, because the mean of its divisors is an integer number (4912518600).

Almost surely, 2^66166161127 is an apocalyptic number.

66166161127 is a deficient number, since it is larger than the sum of its proper divisors (12434136473).

66166161127 is a wasteful number, since it uses less digits than its factorization.

66166161127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10916766.

The product of its digits is 108864, while the sum is 43.

The spelling of 66166161127 in words is "sixty-six billion, one hundred sixty-six million, one hundred sixty-one thousand, one hundred twenty-seven".