2660220860 has 96 divisors (see below), whose sum is σ = 6469460928. Its totient is φ = 908103680.

The previous prime is 2660220859. The next prime is 2660220869. The reversal of 2660220860 is 680220662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660220869) 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, 2082542 + ... + 2083818.

It is an arithmetic number, because the mean of its divisors is an integer number (67390218).

Almost surely, 2^2660220860 is an apocalyptic number.

2660220860 is a gapful number since it is divisible by the number (20) 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 2660220860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3234730464).

2660220860 is an abundant number, since it is smaller than the sum of its proper divisors (3809240068).

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

2660220860 is a wasteful number, since it uses less digits than its factorization.

2660220860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871 (or 1869 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 2660220860 is about 51577.3289343293. The cubic root of 2660220860 is about 1385.6043290571.

The spelling of 2660220860 in words is "two billion, six hundred sixty million, two hundred twenty thousand, eight hundred sixty".