6720306672 has 20 divisors (see below), whose sum is σ = 17360792360. Its totient is φ = 2240102208.

The previous prime is 6720306661. The next prime is 6720306673. The reversal of 6720306672 is 2766030276.

It is a self number, because there is not a number n which added to its sum of digits gives 6720306672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720306673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70003147 + ... + 70003242.

It is an arithmetic number, because the mean of its divisors is an integer number (868039618).

Almost surely, 2^6720306672 is an apocalyptic number.

It is an amenable number.

6720306672 is an abundant number, since it is smaller than the sum of its proper divisors (10640485688).

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

6720306672 is a wasteful number, since it uses less digits than its factorization.

6720306672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140006400 (or 140006394 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 39.

The square root of 6720306672 is about 81977.4766140066. The cubic root of 6720306672 is about 1887.1062977346.

The spelling of 6720306672 in words is "six billion, seven hundred twenty million, three hundred six thousand, six hundred seventy-two".