6618116171920 has 320 divisors, whose sum is σ = 17618712330240. Its totient is φ = 2289869568000.

The previous prime is 6618116171899. The next prime is 6618116171929. The reversal of 6618116171920 is 291716118166.

It is not an unprimeable number, because it can be changed into a prime (6618116171929) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 489390279 + ... + 489403801.

It is an arithmetic number, because the mean of its divisors is an integer number (55058476032).

Almost surely, 2^{6618116171920} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6618116171920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8809356165120).

6618116171920 is an abundant number, since it is smaller than the sum of its proper divisors (11000596158320).

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

6618116171920 is a wasteful number, since it uses less digits than its factorization.

6618116171920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13854 (or 13848 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 49.

The spelling of 6618116171920 in words is "six trillion, six hundred eighteen billion, one hundred sixteen million, one hundred seventy-one thousand, nine hundred twenty".