66110151705720 has 128 divisors (see below), whose sum is σ = 198466228477440. Its totient is φ = 17617308387840.

The previous prime is 66110151705679. The next prime is 66110151705721. The reversal of 66110151705720 is 2750715101166.

66110151705720 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66110151705721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1504772874 + ... + 1504816806.

It is an arithmetic number, because the mean of its divisors is an integer number (1550517409980).

Almost surely, 2^{66110151705720} is an apocalyptic number.

66110151705720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66110151705720 is an abundant number, since it is smaller than the sum of its proper divisors (132356076771720).

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

66110151705720 is a wasteful number, since it uses less digits than its factorization.

66110151705720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52245 (or 52241 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 42.

Adding to 66110151705720 its reverse (2750715101166), we get a palindrome (68860866806886).

The spelling of 66110151705720 in words is "sixty-six trillion, one hundred ten billion, one hundred fifty-one million, seven hundred five thousand, seven hundred twenty".