2661120018 has 24 divisors (see below), whose sum is σ = 5786289756. Its totient is φ = 883881600.

The previous prime is 2661120017. The next prime is 2661120043. The reversal of 2661120018 is 8100211662.

2661120018 is a `hidden beast` number, since 26 + 611 + 20 + 0 + 1 + 8 = 666.

2661120018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2549543049 + 111576969 = 50493^2 + 10563^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2661119973 and 2661120000.

It is not an unprimeable number, because it can be changed into a prime (2661120017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258003 + ... + 268118.

Almost surely, 2^2661120018 is an apocalyptic number.

2661120018 is an abundant number, since it is smaller than the sum of its proper divisors (3125169738).

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

2661120018 is a wasteful number, since it uses less digits than its factorization.

2661120018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526410 (or 526407 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 2661120018 is about 51586.0447989570. The cubic root of 2661120018 is about 1385.7604234743.

The spelling of 2661120018 in words is "two billion, six hundred sixty-one million, one hundred twenty thousand, eighteen".