6721549072 has 40 divisors (see below), whose sum is σ = 15530541696. Its totient is φ = 2755416576.

The previous prime is 6721549057. The next prime is 6721549073. The reversal of 6721549072 is 2709451276.

It is a super-2 number, since 2×6721549072² = 90358443854608122368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6721549073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302073 + ... + 1307224.

Almost surely, 2^6721549072 is an apocalyptic number.

It is an amenable number.

6721549072 is an abundant number, since it is smaller than the sum of its proper divisors (8808992624).

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

6721549072 is a wasteful number, since it uses less digits than its factorization.

6721549072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609335 (or 2609329 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 6721549072 is about 81985.0539549740. The cubic root of 6721549072 is about 1887.2225819318. Note that the first 3 decimals are identical.

The spelling of 6721549072 in words is "six billion, seven hundred twenty-one million, five hundred forty-nine thousand, seventy-two".