6628445 has 8 divisors (see below), whose sum is σ = 8104536. Its totient is φ = 5202496.

The previous prime is 6628423. The next prime is 6628477. The reversal of 6628445 is 5448266.

It can be written as a sum of positive squares in 4 ways, for example, as 3308761 + 3319684 = 1819^2 + 1822^2 .

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 6628445 - 2⁸ = 6628189 is a prime.

It is a d-powerful number, because it can be written as 6⁵ + 6⁷ + 2²¹ + 8⁵ + 4⁷ + 4¹¹ + 5³ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12242 + ... + 12771.

It is an arithmetic number, because the mean of its divisors is an integer number (1013067).

Almost surely, 2^6628445 is an apocalyptic number.

It is an amenable number.

6628445 is a deficient number, since it is larger than the sum of its proper divisors (1476091).

6628445 is a wasteful number, since it uses less digits than its factorization.

6628445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25071.

The product of its digits is 46080, while the sum is 35.

The square root of 6628445 is about 2574.5766642305. The cubic root of 6628445 is about 187.8468365464.

The spelling of 6628445 in words is "six million, six hundred twenty-eight thousand, four hundred forty-five".