2018668351866 has 16 divisors (see below), whose sum is σ = 4042254297888. Its totient is φ = 672069851600.

The previous prime is 2018668351783. The next prime is 2018668351897. The reversal of 2018668351866 is 6681538668102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204894420 + ... + 204904271.

It is an arithmetic number, because the mean of its divisors is an integer number (252640893618).

Almost surely, 2^{2018668351866} is an apocalyptic number.

2018668351866 is an abundant number, since it is smaller than the sum of its proper divisors (2023585946022).

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

2018668351866 is a wasteful number, since it uses less digits than its factorization.

2018668351866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409799517.

The product of its (nonzero) digits is 19906560, while the sum is 60.

The spelling of 2018668351866 in words is "two trillion, eighteen billion, six hundred sixty-eight million, three hundred fifty-one thousand, eight hundred sixty-six".