2117199666 has 8 divisors (see below), whose sum is σ = 4234399344. Its totient is φ = 705733220.

The previous prime is 2117199641. The next prime is 2117199677. The reversal of 2117199666 is 6669917112.

It is a happy number.

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

2117199666 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176433300 + ... + 176433311.

It is an arithmetic number, because the mean of its divisors is an integer number (529299918).

Almost surely, 2^2117199666 is an apocalyptic number.

2117199666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2117199666 is a wasteful number, since it uses less digits than its factorization.

2117199666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352866616.

The product of its digits is 244944, while the sum is 48.

The square root of 2117199666 is about 46013.0380001147. The cubic root of 2117199666 is about 1284.0657799104.

The spelling of 2117199666 in words is "two billion, one hundred seventeen million, one hundred ninety-nine thousand, six hundred sixty-six".