66188295168 has 88 divisors (see below), whose sum is σ = 176509534800. Its totient is φ = 22051061760.

The previous prime is 66188295163. The next prime is 66188295181. The reversal of 66188295168 is 86159288166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66188295161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7309908 + ... + 7318956.

Almost surely, 2^66188295168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66188295168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88254767400).

66188295168 is an abundant number, since it is smaller than the sum of its proper divisors (110321239632).

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

66188295168 is a wasteful number, since it uses less digits than its factorization.

66188295168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11453 (or 11435 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 60.

The spelling of 66188295168 in words is "sixty-six billion, one hundred eighty-eight million, two hundred ninety-five thousand, one hundred sixty-eight".