66944424028000 has 96 divisors (see below), whose sum is σ = 164542704607008. Its totient is φ = 26767960128000.

The previous prime is 66944424027979. The next prime is 66944424028051. The reversal of 66944424028000 is 82042444966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7859902 + ... + 13988098.

It is an arithmetic number, because the mean of its divisors is an integer number (1713986506323).

Almost surely, 2^{66944424028000} 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 66944424028000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82271352303504).

66944424028000 is an abundant number, since it is smaller than the sum of its proper divisors (97598280579008).

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

66944424028000 is a wasteful number, since it uses less digits than its factorization.

66944424028000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6130953 (or 6130935 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 49.

The spelling of 66944424028000 in words is "sixty-six trillion, nine hundred forty-four billion, four hundred twenty-four million, twenty-eight thousand".