66357120000 has 880 divisors, whose sum is σ = 248630912640. Its totient is φ = 15630336000.

The previous prime is 66357119993. The next prime is 66357120013. The reversal of 66357120000 is 2175366.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 66357120000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 620159947 + ... + 620160053.

It is an arithmetic number, because the mean of its divisors is an integer number (282535128).

Almost surely, 2^66357120000 is an apocalyptic number.

66357120000 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 66357120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124315456320).

66357120000 is an abundant number, since it is smaller than the sum of its proper divisors (182273792640).

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

66357120000 is a wasteful number, since it uses less digits than its factorization.

66357120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

Adding to 66357120000 its reverse (2175366), we get a palindrome (66359295366).

The spelling of 66357120000 in words is "sixty-six billion, three hundred fifty-seven million, one hundred twenty thousand".