66539019008 has 432 divisors, whose sum is σ = 181640632320. Its totient is φ = 23721984000.

The previous prime is 66539018993. The next prime is 66539019059. The reversal of 66539019008 is 80091093566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127713788 + ... + 127714308.

Almost surely, 2^66539019008 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 66539019008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90820316160).

66539019008 is an abundant number, since it is smaller than the sum of its proper divisors (115101613312).

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

66539019008 is a wasteful number, since it uses less digits than its factorization.

66539019008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 66539019008 in words is "sixty-six billion, five hundred thirty-nine million, nineteen thousand, eight".