6661710222320 has 20 divisors (see below), whose sum is σ = 15488476267080. Its totient is φ = 2664684088896.

The previous prime is 6661710222311. The next prime is 6661710222341. The reversal of 6661710222320 is 232220171666.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41635688810 + ... + 41635688969.

It is an arithmetic number, because the mean of its divisors is an integer number (774423813354).

Almost surely, 2^{6661710222320} is an apocalyptic number.

It is an amenable number.

6661710222320 is an abundant number, since it is smaller than the sum of its proper divisors (8826766044760).

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

6661710222320 is a wasteful number, since it uses less digits than its factorization.

6661710222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83271377792 (or 83271377786 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

Adding to 6661710222320 its reverse (232220171666), we get a palindrome (6893930393986).

The spelling of 6661710222320 in words is "six trillion, six hundred sixty-one billion, seven hundred ten million, two hundred twenty-two thousand, three hundred twenty".