1001841666 has 64 divisors (see below), whose sum is σ = 2339850240. Its totient is φ = 280062720.

The previous prime is 1001841641. The next prime is 1001841667. The reversal of 1001841666 is 6661481001.

1001841666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1001841667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 413290 + ... + 415706.

It is an arithmetic number, because the mean of its divisors is an integer number (36560160).

Almost surely, 2^1001841666 is an apocalyptic number.

1001841666 is the 16919-th nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001841666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169925120).

1001841666 is an abundant number, since it is smaller than the sum of its proper divisors (1338008574).

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

1001841666 is a wasteful number, since it uses less digits than its factorization.

1001841666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1001841666 is about 31651.8825032572. The cubic root of 1001841666 is about 1000.6135121925.

The spelling of 1001841666 in words is "one billion, one million, eight hundred forty-one thousand, six hundred sixty-six".