666734073200 has 120 divisors (see below), whose sum is σ = 1735378074528. Its totient is φ = 244704291840.

The previous prime is 666734073199. The next prime is 666734073211. The reversal of 666734073200 is 2370437666.

666734073200 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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 484514 + ... + 1252286.

Almost surely, 2^666734073200 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 666734073200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867689037264).

666734073200 is an abundant number, since it is smaller than the sum of its proper divisors (1068644001328).

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

666734073200 is a wasteful number, since it uses less digits than its factorization.

666734073200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767971 (or 767960 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 44.

The spelling of 666734073200 in words is "six hundred sixty-six billion, seven hundred thirty-four million, seventy-three thousand, two hundred".