6729570720 has 120 divisors (see below), whose sum is σ = 23749822404. Its totient is φ = 1794548736.

The previous prime is 6729570709. The next prime is 6729570721. The reversal of 6729570720 is 270759276.

6729570720 is a `hidden beast` number, since 6 + 7 + 2 + 9 + 570 + 72 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5709918096 + 1019652624 = 75564^2 + 31932^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (6729570721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 246669 + ... + 272588.

Almost surely, 2^6729570720 is an apocalyptic number.

6729570720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6729570720 is an abundant number, since it is smaller than the sum of its proper divisors (17020251684).

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

6729570720 is a wasteful number, since it uses less digits than its factorization.

6729570720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519284 (or 519267 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 45.

The square root of 6729570720 is about 82033.9607723533. The cubic root of 6729570720 is about 1887.9730347820.

The spelling of 6729570720 in words is "six billion, seven hundred twenty-nine million, five hundred seventy thousand, seven hundred twenty".