6624623 has 4 divisors (see below), whose sum is σ = 6778728. Its totient is φ = 6470520.

The previous prime is 6624619. The next prime is 6624641. The reversal of 6624623 is 3264266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3264266 = 2 ⋅1632133.

It is a cyclic number.

It is not a de Polignac number, because 6624623 - 2² = 6624619 is a prime.

It is a d-powerful number, because it can be written as 6 + 6⁶ + 2³ + 4¹¹ + 6⁷ + 2²¹ + 3⁸ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6624613) 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 3 ways as a sum of consecutive naturals, for example, 76988 + ... + 77073.

It is an arithmetic number, because the mean of its divisors is an integer number (1694682).

Almost surely, 2^6624623 is an apocalyptic number.

6624623 is a deficient number, since it is larger than the sum of its proper divisors (154105).

6624623 is a wasteful number, since it uses less digits than its factorization.

6624623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154104.

The product of its digits is 10368, while the sum is 29.

The square root of 6624623 is about 2573.8342992508. The cubic root of 6624623 is about 187.8107250781.

Adding to 6624623 its reverse (3264266), we get a palindrome (9888889).

The spelling of 6624623 in words is "six million, six hundred twenty-four thousand, six hundred twenty-three".