2110001199966 has 144 divisors (see below), whose sum is σ = 5154328539360. Its totient is φ = 623138313600.

The previous prime is 2110001199949. The next prime is 2110001199989. The reversal of 2110001199966 is 6699911000112.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14408671 + ... + 14554373.

It is an arithmetic number, because the mean of its divisors is an integer number (35793948190).

Almost surely, 2^{2110001199966} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2110001199966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2577164269680).

2110001199966 is an abundant number, since it is smaller than the sum of its proper divisors (3044327339394).

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

2110001199966 is a wasteful number, since it uses less digits than its factorization.

2110001199966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145903 (or 145889 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The spelling of 2110001199966 in words is "two trillion, one hundred ten billion, one million, one hundred ninety-nine thousand, nine hundred sixty-six".