6624405 has 12 divisors (see below), whose sum is σ = 11482380. Its totient is φ = 3532992.

The previous prime is 6624379. The next prime is 6624413. The reversal of 6624405 is 5044266.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4498641 + 2125764 = 2121^2 + 1458^2 .

It is not a de Polignac number, because 6624405 - 2⁹ = 6623893 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73560 + ... + 73649.

It is an arithmetic number, because the mean of its divisors is an integer number (956865).

Almost surely, 2^6624405 is an apocalyptic number.

It is an amenable number.

6624405 is a deficient number, since it is larger than the sum of its proper divisors (4857975).

6624405 is a wasteful number, since it uses less digits than its factorization.

6624405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147220 (or 147217 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 6624405 is about 2573.7919496338. The cubic root of 6624405 is about 187.8086649263.

The spelling of 6624405 in words is "six million, six hundred twenty-four thousand, four hundred five".