66328753920 has 864 divisors, whose sum is σ = 255758361600. Its totient is φ = 14549483520.

The previous prime is 66328753873. The next prime is 66328753927. The reversal of 66328753920 is 2935782366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66328753927) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 477185211 + ... + 477185349.

Almost surely, 2^66328753920 is an apocalyptic number.

66328753920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66328753920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127879180800).

66328753920 is an abundant number, since it is smaller than the sum of its proper divisors (189429607680).

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

66328753920 is a wasteful number, since it uses less digits than its factorization.

66328753920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 66328753920 in words is "sixty-six billion, three hundred twenty-eight million, seven hundred fifty-three thousand, nine hundred twenty".