66000044000 has 192 divisors, whose sum is σ = 177287527872. Its totient is φ = 23948032000.

The previous prime is 66000043979. The next prime is 66000044003. The reversal of 66000044000 is 44000066.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66000044003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24506654 + ... + 24509346.

It is an arithmetic number, because the mean of its divisors is an integer number (923372541).

Almost surely, 2^66000044000 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 66000044000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88643763936).

66000044000 is an abundant number, since it is smaller than the sum of its proper divisors (111287483872).

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

66000044000 is a wasteful number, since it uses less digits than its factorization.

66000044000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286 (or 3268 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 66000044000 its reverse (44000066), we get a palindrome (66044044066).

The spelling of 66000044000 in words is "sixty-six billion, forty-four thousand", and thus it is an eban number.