2220646660 has 48 divisors (see below), whose sum is σ = 4982120640. Its totient is φ = 828938880.

The previous prime is 2220646643. The next prime is 2220646669. The reversal of 2220646660 is 666460222.

It is not an unprimeable number, because it can be changed into a prime (2220646669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18151 + ... + 69070.

It is an arithmetic number, because the mean of its divisors is an integer number (103794180).

Almost surely, 2^2220646660 is an apocalyptic number.

2220646660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220646660 is an abundant number, since it is smaller than the sum of its proper divisors (2761473980).

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

2220646660 is a wasteful number, since it uses less digits than its factorization.

2220646660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87316 (or 87314 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 2220646660 is about 47123.7377549786. The cubic root of 2220646660 is about 1304.6474015960.

The spelling of 2220646660 in words is "two billion, two hundred twenty million, six hundred forty-six thousand, six hundred sixty".