66064556643200 has 192 divisors, whose sum is σ = 163453873104000. Its totient is φ = 26384761036800.

The previous prime is 66064556643139. The next prime is 66064556643289. The reversal of 66064556643200 is 234665546066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8187448766 + ... + 8187456834.

It is an arithmetic number, because the mean of its divisors is an integer number (851322255750).

Almost surely, 2^{66064556643200} 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 66064556643200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81726936552000).

66064556643200 is an abundant number, since it is smaller than the sum of its proper divisors (97389316460800).

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

66064556643200 is a wasteful number, since it uses less digits than its factorization.

66064556643200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11753 (or 11736 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 53.

The spelling of 66064556643200 in words is "sixty-six trillion, sixty-four billion, five hundred fifty-six million, six hundred forty-three thousand, two hundred".