2166343908 has 12 divisors (see below), whose sum is σ = 5054802480. Its totient is φ = 722114632.

The previous prime is 2166343901. The next prime is 2166343909. The reversal of 2166343908 is 8093436612.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2166343908.

It is not an unprimeable number, because it can be changed into a prime (2166343901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90264318 + ... + 90264341.

It is an arithmetic number, because the mean of its divisors is an integer number (421233540).

Almost surely, 2^2166343908 is an apocalyptic number.

It is an amenable number.

2166343908 is an abundant number, since it is smaller than the sum of its proper divisors (2888458572).

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

2166343908 is a wasteful number, since it uses less digits than its factorization.

2166343908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180528666 (or 180528664 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 2166343908 is about 46543.9996992093. Note that the first 3 decimals coincide. The cubic root of 2166343908 is about 1293.9250896454.

The spelling of 2166343908 in words is "two billion, one hundred sixty-six million, three hundred forty-three thousand, nine hundred eight".