11720722266 has 48 divisors (see below), whose sum is σ = 27739726560. Its totient is φ = 3547092960.

The previous prime is 11720722241. The next prime is 11720722271. The reversal of 11720722266 is 66222702711.

It is a happy number.

11720722266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 11720722266.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114765 + ... + 191343.

It is an arithmetic number, because the mean of its divisors is an integer number (577910970).

Almost surely, 2^11720722266 is an apocalyptic number.

11720722266 is an abundant number, since it is smaller than the sum of its proper divisors (16019004294).

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

11720722266 is a wasteful number, since it uses less digits than its factorization.

11720722266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77371 (or 77368 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 11720722266 in words is "eleven billion, seven hundred twenty million, seven hundred twenty-two thousand, two hundred sixty-six".