66403722880704 has 448 divisors, whose sum is σ = 197839971412992. Its totient is φ = 19479763353600.

The previous prime is 66403722880673. The next prime is 66403722880723. The reversal of 66403722880704 is 40708822730466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26529652317 + ... + 26529654819.

Almost surely, 2^{66403722880704} is an apocalyptic number.

66403722880704 is a gapful number since it is divisible by the number (64) 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 66403722880704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98919985706496).

66403722880704 is an abundant number, since it is smaller than the sum of its proper divisors (131436248532288).

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

66403722880704 is a wasteful number, since it uses less digits than its factorization.

66403722880704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4144 (or 4134 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 57.

The spelling of 66403722880704 in words is "sixty-six trillion, four hundred three billion, seven hundred twenty-two million, eight hundred eighty thousand, seven hundred four".