6646726436 has 48 divisors (see below), whose sum is σ = 14083001856. Its totient is φ = 2679588864.

The previous prime is 6646726397. The next prime is 6646726451. The reversal of 6646726436 is 6346276466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1589180 + ... + 1593356.

It is an arithmetic number, because the mean of its divisors is an integer number (293395872).

Almost surely, 2^6646726436 is an apocalyptic number.

It is an amenable number.

6646726436 is an abundant number, since it is smaller than the sum of its proper divisors (7436275420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6646726436 is a wasteful number, since it uses less digits than its factorization.

6646726436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7548 (or 7546 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 50.

The square root of 6646726436 is about 81527.4581720784. The cubic root of 6646726436 is about 1880.1937362591.

The spelling of 6646726436 in words is "six billion, six hundred forty-six million, seven hundred twenty-six thousand, four hundred thirty-six".