2211660660 has 48 divisors (see below), whose sum is σ = 6755620032. Its totient is φ = 536160000.

The previous prime is 2211660653. The next prime is 2211660673. The reversal of 2211660660 is 660661122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1674841 + ... + 1676160.

It is an arithmetic number, because the mean of its divisors is an integer number (140742084).

Almost surely, 2^2211660660 is an apocalyptic number.

2211660660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211660660 is an abundant number, since it is smaller than the sum of its proper divisors (4543959372).

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

2211660660 is a wasteful number, since it uses less digits than its factorization.

2211660660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351024 (or 3351022 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 2211660660 is about 47028.2963756928. The cubic root of 2211660660 is about 1302.8852406290.

The spelling of 2211660660 in words is "two billion, two hundred eleven million, six hundred sixty thousand, six hundred sixty".