6624409 has 8 divisors (see below), whose sum is σ = 7252128. Its totient is φ = 6000960.

The previous prime is 6624379. The next prime is 6624413. The reversal of 6624409 is 9044266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6624409 - 2⁵ = 6624377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6624439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2814 + ... + 4600.

It is an arithmetic number, because the mean of its divisors is an integer number (906516).

Almost surely, 2^6624409 is an apocalyptic number.

It is an amenable number.

6624409 is a deficient number, since it is larger than the sum of its proper divisors (627719).

6624409 is a wasteful number, since it uses less digits than its factorization.

6624409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 6624409 is about 2573.7927266973. The cubic root of 6624409 is about 187.8087027277.

The spelling of 6624409 in words is "six million, six hundred twenty-four thousand, four hundred nine".