66664371200 has 528 divisors, whose sum is σ = 203224849920. Its totient is φ = 21162885120.

The previous prime is 66664371161. The next prime is 66664371211. The reversal of 66664371200 is 217346666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240665462 + ... + 240665738.

Almost surely, 2^66664371200 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 66664371200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101612424960).

66664371200 is an abundant number, since it is smaller than the sum of its proper divisors (136560478720).

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

66664371200 is a wasteful number, since it uses less digits than its factorization.

66664371200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 66664371200 in words is "sixty-six billion, six hundred sixty-four million, three hundred seventy-one thousand, two hundred".