6720003 has 10 divisors (see below), whose sum is σ = 10038644. Its totient is φ = 4479948.

The previous prime is 6719989. The next prime is 6720011. The reversal of 6720003 is 3000276.

It is not a de Polignac number, because 6720003 - 2⁹ = 6719491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6720403) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41401 + ... + 41562.

Almost surely, 2^6720003 is an apocalyptic number.

6720003 is a deficient number, since it is larger than the sum of its proper divisors (3318641).

6720003 is an equidigital number, since it uses as much as digits as its factorization.

6720003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82975 (or 82966 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 6720003 is about 2592.2968580006. The cubic root of 6720003 is about 188.7077872942.

Adding to 6720003 its reverse (3000276), we get a palindrome (9720279).

The spelling of 6720003 in words is "six million, seven hundred twenty thousand, three".