2166250018 has 16 divisors (see below), whose sum is σ = 3306821760. Its totient is φ = 1064002576.

The previous prime is 2166249979. The next prime is 2166250043. The reversal of 2166250018 is 8100526612.

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, 180996 + ... + 192592.

It is an arithmetic number, because the mean of its divisors is an integer number (206676360).

Almost surely, 2^2166250018 is an apocalyptic number.

2166250018 is a deficient number, since it is larger than the sum of its proper divisors (1140571742).

2166250018 is a wasteful number, since it uses less digits than its factorization.

2166250018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13241.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 2166250018 is about 46542.9910727706. The cubic root of 2166250018 is about 1293.9063963404.

The spelling of 2166250018 in words is "two billion, one hundred sixty-six million, two hundred fifty thousand, eighteen".