2166885550 has 48 divisors (see below), whose sum is σ = 4070355552. Its totient is φ = 858211200.

The previous prime is 2166885529. The next prime is 2166885551. The reversal of 2166885550 is 555886612.

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 2166885550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166885551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3433735 + ... + 3434365.

It is an arithmetic number, because the mean of its divisors is an integer number (84799074).

Almost surely, 2^2166885550 is an apocalyptic number.

2166885550 is a deficient number, since it is larger than the sum of its proper divisors (1903470002).

2166885550 is a wasteful number, since it uses less digits than its factorization.

2166885550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 46.

The square root of 2166885550 is about 46549.8179373454. The cubic root of 2166885550 is about 1294.0329189039.

The spelling of 2166885550 in words is "two billion, one hundred sixty-six million, eight hundred eighty-five thousand, five hundred fifty".