2005666433 has 8 divisors (see below), whose sum is σ = 2034766656. Its totient is φ = 1976590000.

The previous prime is 2005666379. The next prime is 2005666471. The reversal of 2005666433 is 3346665002.

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

It is a cyclic number.

It is not a de Polignac number, because 2005666433 - 2⁸ = 2005666177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2005666393 and 2005666402.

It is not an unprimeable number, because it can be changed into a prime (2005666633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231683 + ... + 240183.

It is an arithmetic number, because the mean of its divisors is an integer number (254345832).

Almost surely, 2^2005666433 is an apocalyptic number.

It is an amenable number.

2005666433 is a deficient number, since it is larger than the sum of its proper divisors (29100223).

2005666433 is an equidigital number, since it uses as much as digits as its factorization.

2005666433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11895.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 2005666433 is about 44784.6673873995. The cubic root of 2005666433 is about 1261.1098043036.

The spelling of 2005666433 in words is "two billion, five million, six hundred sixty-six thousand, four hundred thirty-three".