6646430212 has 12 divisors (see below), whose sum is σ = 11778484480. Its totient is φ = 3281148936.

The previous prime is 6646430099. The next prime is 6646430243. The reversal of 6646430212 is 2120346466.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 10516188 + ... + 10516819.

Almost surely, 2^6646430212 is an apocalyptic number.

It is an amenable number.

6646430212 is a deficient number, since it is larger than the sum of its proper divisors (5132054268).

6646430212 is a wasteful number, since it uses less digits than its factorization.

6646430212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21033090 (or 21033088 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 6646430212 is about 81525.6414387523. The cubic root of 6646430212 is about 1880.1658043747.

Adding to 6646430212 its reverse (2120346466), we get a palindrome (8766776678).

The spelling of 6646430212 in words is "six billion, six hundred forty-six million, four hundred thirty thousand, two hundred twelve".