2664221860 has 12 divisors (see below), whose sum is σ = 5594865948. Its totient is φ = 1065688736.

The previous prime is 2664221831. The next prime is 2664221869. The reversal of 2664221860 is 681224662.

2664221860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 954068544 + 1710153316 = 30888^2 + 41354^2 .

It is not an unprimeable number, because it can be changed into a prime (2664221869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66605527 + ... + 66605566.

It is an arithmetic number, because the mean of its divisors is an integer number (466238829).

Almost surely, 2^2664221860 is an apocalyptic number.

2664221860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2664221860 is an abundant number, since it is smaller than the sum of its proper divisors (2930644088).

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

2664221860 is a wasteful number, since it uses less digits than its factorization.

2664221860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133211102 (or 133211100 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 2664221860 is about 51616.1007826046. The cubic root of 2664221860 is about 1386.2986355602.

The spelling of 2664221860 in words is "two billion, six hundred sixty-four million, two hundred twenty-one thousand, eight hundred sixty".