6720111 has 8 divisors (see below), whose sum is σ = 9955760. Its totient is φ = 4480056.

The previous prime is 6720089. The next prime is 6720143. The reversal of 6720111 is 1110276.

It is not a de Polignac number, because 6720111 - 2⁶ = 6720047 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 (6720191) 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 7 ways as a sum of consecutive naturals, for example, 124420 + ... + 124473.

It is an arithmetic number, because the mean of its divisors is an integer number (1244470).

Almost surely, 2^6720111 is an apocalyptic number.

6720111 is a deficient number, since it is larger than the sum of its proper divisors (3235649).

6720111 is a wasteful number, since it uses less digits than its factorization.

6720111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248902 (or 248896 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 6720111 is about 2592.3176888645. The cubic root of 6720111 is about 188.7087982229.

Adding to 6720111 its reverse (1110276), we get a palindrome (7830387).

The spelling of 6720111 in words is "six million, seven hundred twenty thousand, one hundred eleven".