6646620206 has 16 divisors (see below), whose sum is σ = 10003824000. Its totient is φ = 3312032568.

The previous prime is 6646620173. The next prime is 6646620241. The reversal of 6646620206 is 6020266466.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6646620206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737081 + ... + 746043.

It is an arithmetic number, because the mean of its divisors is an integer number (625239000).

Almost surely, 2^6646620206 is an apocalyptic number.

6646620206 is a deficient number, since it is larger than the sum of its proper divisors (3357203794).

6646620206 is a wasteful number, since it uses less digits than its factorization.

6646620206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10183.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 6646620206 is about 81526.8066711802. The cubic root of 6646620206 is about 1880.1837195967.

The spelling of 6646620206 in words is "six billion, six hundred forty-six million, six hundred twenty thousand, two hundred six".