66195502110720 has 960 divisors, whose sum is σ = 239868162293760. Its totient is φ = 17459597869056.

The previous prime is 66195502110701. The next prime is 66195502110733. The reversal of 66195502110720 is 2701120559166.

It is a happy number.

66195502110720 is a `hidden beast` number, since 6 + 6 + 1 + 9 + 5 + 502 + 110 + 7 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 30889173969 + ... + 30889176111.

It is an arithmetic number, because the mean of its divisors is an integer number (249862669056).

Almost surely, 2^{66195502110720} is an apocalyptic number.

66195502110720 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 66195502110720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119934081146880).

66195502110720 is an abundant number, since it is smaller than the sum of its proper divisors (173672660183040).

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

66195502110720 is a wasteful number, since it uses less digits than its factorization.

66195502110720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572 (or 2543 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

Adding to 66195502110720 its reverse (2701120559166), we get a palindrome (68896622669886).

The spelling of 66195502110720 in words is "sixty-six trillion, one hundred ninety-five billion, five hundred two million, one hundred ten thousand, seven hundred twenty".