2005821066 has 8 divisors (see below), whose sum is σ = 4011642144. Its totient is φ = 668607020.

The previous prime is 2005821049. The next prime is 2005821079. The reversal of 2005821066 is 6601285002.

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

2005821066 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167151750 + ... + 167151761.

It is an arithmetic number, because the mean of its divisors is an integer number (501455268).

Almost surely, 2^2005821066 is an apocalyptic number.

2005821066 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.

2005821066 is a wasteful number, since it uses less digits than its factorization.

2005821066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334303516.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 2005821066 is about 44786.3937597123. The cubic root of 2005821066 is about 1261.1422131791.

The spelling of 2005821066 in words is "two billion, five million, eight hundred twenty-one thousand, sixty-six".