2006643766 has 24 divisors (see below), whose sum is σ = 3063813984. Its totient is φ = 985673520.

The previous prime is 2006643703. The next prime is 2006643787. The reversal of 2006643766 is 6673466002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4655571 + ... + 4656001.

It is an arithmetic number, because the mean of its divisors is an integer number (127658916).

Almost surely, 2^2006643766 is an apocalyptic number.

2006643766 is a deficient number, since it is larger than the sum of its proper divisors (1057170218).

2006643766 is an equidigital number, since it uses as much as digits as its factorization.

2006643766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 40.

The square root of 2006643766 is about 44795.5775272515. The cubic root of 2006643766 is about 1261.3146113883.

The spelling of 2006643766 in words is "two billion, six million, six hundred forty-three thousand, seven hundred sixty-six".