66166161126 has 64 divisors (see below), whose sum is σ = 144926724096. Its totient is φ = 20014185600.

The previous prime is 66166161121. The next prime is 66166161143. The reversal of 66166161126 is 62116166166.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 15066391 + ... + 15070781.

It is an arithmetic number, because the mean of its divisors is an integer number (2264480064).

Almost surely, 2^66166161126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66166161126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72463362048).

66166161126 is an abundant number, since it is smaller than the sum of its proper divisors (78760562970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66166161126 is a wasteful number, since it uses less digits than its factorization.

66166161126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7637.

The product of its digits is 93312, while the sum is 42.

The spelling of 66166161126 in words is "sixty-six billion, one hundred sixty-six million, one hundred sixty-one thousand, one hundred twenty-six".