2220878766 has 32 divisors (see below), whose sum is σ = 4499193600. Its totient is φ = 730748480.

The previous prime is 2220878761. The next prime is 2220878773. The reversal of 2220878766 is 6678780222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220878761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348751 + ... + 355061.

It is an arithmetic number, because the mean of its divisors is an integer number (140599800).

Almost surely, 2^2220878766 is an apocalyptic number.

2220878766 is an abundant number, since it is smaller than the sum of its proper divisors (2278314834).

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

2220878766 is a wasteful number, since it uses less digits than its factorization.

2220878766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7064.

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 2220878766 is about 47126.2004197241. The cubic root of 2220878766 is about 1304.6928547134.

The spelling of 2220878766 in words is "two billion, two hundred twenty million, eight hundred seventy-eight thousand, seven hundred sixty-six".