6643205606 has 8 divisors (see below), whose sum is σ = 10152823824. Its totient is φ = 3258931000.

The previous prime is 6643205599. The next prime is 6643205629. The reversal of 6643205606 is 6065023466.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6643205606.

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, 31335770 + ... + 31335981.

It is an arithmetic number, because the mean of its divisors is an integer number (1269102978).

Almost surely, 2^6643205606 is an apocalyptic number.

6643205606 is a deficient number, since it is larger than the sum of its proper divisors (3509618218).

6643205606 is a wasteful number, since it uses less digits than its factorization.

6643205606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62671806.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 6643205606 is about 81505.8624026517. The cubic root of 6643205606 is about 1879.8616925188.

The spelling of 6643205606 in words is "six billion, six hundred forty-three million, two hundred five thousand, six hundred six".