66372167064 has 128 divisors (see below), whose sum is σ = 198862272000. Its totient is φ = 18058650624.

The previous prime is 66372167011. The next prime is 66372167111. The reversal of 66372167064 is 46076127366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262347 + ... + 448965.

It is an arithmetic number, because the mean of its divisors is an integer number (1553611500).

Almost surely, 2^66372167064 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 66372167064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99431136000).

66372167064 is an abundant number, since it is smaller than the sum of its proper divisors (132490104936).

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

66372167064 is a wasteful number, since it uses less digits than its factorization.

66372167064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186737 (or 186733 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 66372167064 in words is "sixty-six billion, three hundred seventy-two million, one hundred sixty-seven thousand, sixty-four".