6640044640206 has 8 divisors (see below), whose sum is σ = 13280089280424. Its totient is φ = 2213348213400.

The previous prime is 6640044640193. The next prime is 6640044640223. The reversal of 6640044640206 is 6020464400466.

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

6640044640206 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553337053345 + ... + 553337053356.

It is an arithmetic number, because the mean of its divisors is an integer number (1660011160053).

Almost surely, 2^{6640044640206} is an apocalyptic number.

6640044640206 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.

6640044640206 is a wasteful number, since it uses less digits than its factorization.

6640044640206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106674106706.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 6640044640206 in words is "six trillion, six hundred forty billion, forty-four million, six hundred forty thousand, two hundred six".