66863927808000 has 3744 divisors, whose sum is σ = 279054699505920. Its totient is φ = 15353354649600.

The previous prime is 66863927807993. The next prime is 66863927808071. The reversal of 66863927808000 is 80872936866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1133286911971 + ... + 1133286912029.

It is an arithmetic number, because the mean of its divisors is an integer number (74533840680).

Almost surely, 2^{66863927808000} is an apocalyptic number.

66863927808000 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 66863927808000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139527349752960).

66863927808000 is an abundant number, since it is smaller than the sum of its proper divisors (212190771697920).

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

66863927808000 is a wasteful number, since it uses less digits than its factorization.

66863927808000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 66863927808000 in words is "sixty-six trillion, eight hundred sixty-three billion, nine hundred twenty-seven million, eight hundred eight thousand".