66171048066 has 16 divisors (see below), whose sum is σ = 147046773600. Its totient is φ = 22057016004.

The previous prime is 66171048059. The next prime is 66171048067. The reversal of 66171048066 is 66084017166.

It is not an unprimeable number, because it can be changed into a prime (66171048067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612694836 + ... + 612694943.

It is an arithmetic number, because the mean of its divisors is an integer number (9190423350).

Almost surely, 2^66171048066 is an apocalyptic number.

66171048066 is an abundant number, since it is smaller than the sum of its proper divisors (80875725534).

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

66171048066 is a wasteful number, since it uses less digits than its factorization.

66171048066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225389790 (or 1225389784 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 66171048066 in words is "sixty-six billion, one hundred seventy-one million, forty-eight thousand, sixty-six".