6720623 has 32 divisors (see below), whose sum is σ = 9139200. Its totient is φ = 4818528.

The previous prime is 6720619. The next prime is 6720629. The reversal of 6720623 is 3260276.

It is not a de Polignac number, because 6720623 - 2² = 6720619 is a prime.

It is a super-3 number, since 3×6720623³ (a number of 21 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6720592 and 6720601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720629) 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 31 ways as a sum of consecutive naturals, for example, 292190 + ... + 292212.

It is an arithmetic number, because the mean of its divisors is an integer number (285600).

Almost surely, 2^6720623 is an apocalyptic number.

6720623 is a deficient number, since it is larger than the sum of its proper divisors (2418577).

6720623 is a wasteful number, since it uses less digits than its factorization.

6720623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 6720623 is about 2592.4164403120. The cubic root of 6720623 is about 188.7135906264.

Adding to 6720623 its reverse (3260276), we get a palindrome (9980899).

The spelling of 6720623 in words is "six million, seven hundred twenty thousand, six hundred twenty-three".