6646220012 has 12 divisors (see below), whose sum is σ = 11631552576. Its totient is φ = 3322919280.

The previous prime is 6646220011. The next prime is 6646220027. The reversal of 6646220012 is 2100226466.

It is not an unprimeable number, because it can be changed into a prime (6646220011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55562 + ... + 127982.

It is an arithmetic number, because the mean of its divisors is an integer number (969296048).

Almost surely, 2^6646220012 is an apocalyptic number.

It is an amenable number.

6646220012 is a deficient number, since it is larger than the sum of its proper divisors (4985332564).

6646220012 is a wasteful number, since it uses less digits than its factorization.

6646220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95368 (or 95366 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 6646220012 is about 81524.3522636028. The cubic root of 6646220012 is about 1880.1459834580.

Adding to 6646220012 its reverse (2100226466), we get a palindrome (8746446478).

The spelling of 6646220012 in words is "six billion, six hundred forty-six million, two hundred twenty thousand, twelve".