6623615 has 16 divisors (see below), whose sum is σ = 8288256. Its totient is φ = 5076000.

The previous prime is 6623611. The next prime is 6623707. The reversal of 6623615 is 5163266.

It is not a de Polignac number, because 6623615 - 2² = 6623611 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6623611) 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 15 ways as a sum of consecutive naturals, for example, 23264 + ... + 23546.

It is an arithmetic number, because the mean of its divisors is an integer number (518016).

Almost surely, 2^6623615 is an apocalyptic number.

6623615 is a deficient number, since it is larger than the sum of its proper divisors (1664641).

6623615 is a wasteful number, since it uses less digits than its factorization.

6623615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470.

The product of its digits is 6480, while the sum is 29.

The square root of 6623615 is about 2573.6384749999. The cubic root of 6623615 is about 187.8011988599.

The spelling of 6623615 in words is "six million, six hundred twenty-three thousand, six hundred fifteen".