6721226856 has 64 divisors (see below), whose sum is σ = 18685440000. Its totient is φ = 2238565248.

The previous prime is 6721226851. The next prime is 6721226933. The reversal of 6721226856 is 6586221276.

It is not an unprimeable number, because it can be changed into a prime (6721226851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264100 + ... + 288428.

It is an arithmetic number, because the mean of its divisors is an integer number (291960000).

Almost surely, 2^6721226856 is an apocalyptic number.

It is an amenable number.

6721226856 is an abundant number, since it is smaller than the sum of its proper divisors (11964213144).

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

6721226856 is a wasteful number, since it uses less digits than its factorization.

6721226856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25623 (or 25613 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 6721226856 is about 81983.0888415410. The cubic root of 6721226856 is about 1887.1924250427.

The spelling of 6721226856 in words is "six billion, seven hundred twenty-one million, two hundred twenty-six thousand, eight hundred fifty-six".