2001666834 has 24 divisors (see below), whose sum is σ = 4565205840. Its totient is φ = 632105208.

The previous prime is 2001666833. The next prime is 2001666881. The reversal of 2001666834 is 4386661002.

It is a super-2 number, since 2×2001666834² = 8013340228671167112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2001666833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2926072 + ... + 2926755.

It is an arithmetic number, because the mean of its divisors is an integer number (190216910).

Almost surely, 2^2001666834 is an apocalyptic number.

2001666834 is an abundant number, since it is smaller than the sum of its proper divisors (2563539006).

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

2001666834 is a wasteful number, since it uses less digits than its factorization.

2001666834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852854 (or 5852851 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 2001666834 is about 44739.9914394270. The cubic root of 2001666834 is about 1260.2709659114.

The spelling of 2001666834 in words is "two billion, one million, six hundred sixty-six thousand, eight hundred thirty-four".