2220722766 has 24 divisors (see below), whose sum is σ = 4822543440. Its totient is φ = 738552096.

The previous prime is 2220722743. The next prime is 2220722783. The reversal of 2220722766 is 6672270222.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2220722766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132615 + ... + 148418.

It is an arithmetic number, because the mean of its divisors is an integer number (200939310).

Almost surely, 2^2220722766 is an apocalyptic number.

2220722766 is an abundant number, since it is smaller than the sum of its proper divisors (2601820674).

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

2220722766 is a wasteful number, since it uses less digits than its factorization.

2220722766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281480 (or 281477 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 2220722766 is about 47124.5452604054. The cubic root of 2220722766 is about 1304.6623057172.

Adding to 2220722766 its reverse (6672270222), we get a palindrome (8892992988).

The spelling of 2220722766 in words is "two billion, two hundred twenty million, seven hundred twenty-two thousand, seven hundred sixty-six".