66043452555216 has 240 divisors, whose sum is σ = 190932563016000. Its totient is φ = 21294621038592.

The previous prime is 66043452555203. The next prime is 66043452555217. The reversal of 66043452555216 is 61255525434066.

66043452555216 is a `hidden beast` number, since 6 + 6 + 0 + 4 + 34 + 52 + 5 + 552 + 1 + 6 = 666.

66043452555216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66043452555217) 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 47 ways as a sum of consecutive naturals, for example, 6539598135 + ... + 6539608233.

It is an arithmetic number, because the mean of its divisors is an integer number (795552345900).

Almost surely, 2^{66043452555216} 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 66043452555216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95466281508000).

66043452555216 is an abundant number, since it is smaller than the sum of its proper divisors (124889110460784).

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

66043452555216 is a wasteful number, since it uses less digits than its factorization.

66043452555216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17186 (or 17177 counting only the distinct ones).

The product of its (nonzero) digits is 25920000, while the sum is 54.

The spelling of 66043452555216 in words is "sixty-six trillion, forty-three billion, four hundred fifty-two million, five hundred fifty-five thousand, two hundred sixteen".