2166868211 has 8 divisors (see below), whose sum is σ = 2180252880. Its totient is φ = 2153498112.

The previous prime is 2166868201. The next prime is 2166868237. The reversal of 2166868211 is 1128686612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166868211 - 2⁶ = 2166868147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166868201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504971 + ... + 509243.

It is an arithmetic number, because the mean of its divisors is an integer number (272531610).

Almost surely, 2^2166868211 is an apocalyptic number.

2166868211 is a deficient number, since it is larger than the sum of its proper divisors (13384669).

2166868211 is a wasteful number, since it uses less digits than its factorization.

2166868211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7285.

The product of its digits is 55296, while the sum is 41.

The square root of 2166868211 is about 46549.6316956429. The cubic root of 2166868211 is about 1294.0294673608.

The spelling of 2166868211 in words is "two billion, one hundred sixty-six million, eight hundred sixty-eight thousand, two hundred eleven".