6720360191 has 4 divisors (see below), whose sum is σ = 6720526584. Its totient is φ = 6720193800.

The previous prime is 6720360181. The next prime is 6720360223. The reversal of 6720360191 is 1910630276.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6720360191 - 2¹⁴ = 6720343807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720360181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20321 + ... + 117701.

It is an arithmetic number, because the mean of its divisors is an integer number (1680131646).

Almost surely, 2^6720360191 is an apocalyptic number.

6720360191 is a deficient number, since it is larger than the sum of its proper divisors (166393).

6720360191 is an equidigital number, since it uses as much as digits as its factorization.

6720360191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166392.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 6720360191 is about 81977.8030383835. The cubic root of 6720360191 is about 1887.1113072170. Note that the first 3 decimals are identical.

The spelling of 6720360191 in words is "six billion, seven hundred twenty million, three hundred sixty thousand, one hundred ninety-one".