6624425 has 6 divisors (see below), whose sum is σ = 8214318. Its totient is φ = 5299520.

The previous prime is 6624413. The next prime is 6624427. The reversal of 6624425 is 5244266.

It can be written as a sum of positive squares in 3 ways, for example, as 4096 + 6620329 = 64^2 + 2573^2 .

It is not a de Polignac number, because 6624425 - 2¹⁰ = 6623401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6624427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132464 + ... + 132513.

It is an arithmetic number, because the mean of its divisors is an integer number (1369053).

Almost surely, 2^6624425 is an apocalyptic number.

It is an amenable number.

6624425 is a deficient number, since it is larger than the sum of its proper divisors (1589893).

6624425 is a wasteful number, since it uses less digits than its factorization.

6624425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264987 (or 264982 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 6624425 is about 2573.7958349488. The cubic root of 6624425 is about 187.8088539329.

The spelling of 6624425 in words is "six million, six hundred twenty-four thousand, four hundred twenty-five".