2109666006 has 64 divisors (see below), whose sum is σ = 5407142400. Its totient is φ = 597220128.

The previous prime is 2109665989. The next prime is 2109666019. The reversal of 2109666006 is 6006669012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15601 + ... + 66803.

It is an arithmetic number, because the mean of its divisors is an integer number (84486600).

Almost surely, 2^2109666006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2109666006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2703571200).

2109666006 is an abundant number, since it is smaller than the sum of its proper divisors (3297476394).

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

2109666006 is a wasteful number, since it uses less digits than its factorization.

2109666006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51330 (or 51324 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 2109666006 is about 45931.1006399803. The cubic root of 2109666006 is about 1282.5409336820.

The spelling of 2109666006 in words is "two billion, one hundred nine million, six hundred sixty-six thousand, six".