66895582528320 has 1344 divisors, whose sum is σ = 269667448528896. Its totient is φ = 13750584606720.

The previous prime is 66895582528253. The next prime is 66895582528351. The reversal of 66895582528320 is 2382528559866.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 12116567160 + ... + 12116572680.

Almost surely, 2^{66895582528320} is an apocalyptic number.

66895582528320 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 66895582528320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134833724264448).

66895582528320 is an abundant number, since it is smaller than the sum of its proper divisors (202771866000576).

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

66895582528320 is a wasteful number, since it uses less digits than its factorization.

66895582528320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5848 (or 5825 counting only the distinct ones).

The product of its (nonzero) digits is 497664000, while the sum is 69.

The spelling of 66895582528320 in words is "sixty-six trillion, eight hundred ninety-five billion, five hundred eighty-two million, five hundred twenty-eight thousand, three hundred twenty".