6720234647 has 4 divisors (see below), whose sum is σ = 7680268176. Its totient is φ = 5760201120.

The previous prime is 6720234643. The next prime is 6720234671. The reversal of 6720234647 is 7464320276.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6720234647 - 2² = 6720234643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720234643) 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, 480016754 + ... + 480016767.

It is an arithmetic number, because the mean of its divisors is an integer number (1920067044).

Almost surely, 2^6720234647 is an apocalyptic number.

6720234647 is a deficient number, since it is larger than the sum of its proper divisors (960033529).

6720234647 is an equidigital number, since it uses as much as digits as its factorization.

6720234647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960033528.

The product of its (nonzero) digits is 338688, while the sum is 41.

The square root of 6720234647 is about 81977.0373153361. The cubic root of 6720234647 is about 1887.0995560126.

The spelling of 6720234647 in words is "six billion, seven hundred twenty million, two hundred thirty-four thousand, six hundred forty-seven".