6648517 has 2 divisors, whose sum is σ = 6648518. Its totient is φ = 6648516.

The previous prime is 6648503. The next prime is 6648571. The reversal of 6648517 is 7158466.

Together with next prime (6648571) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6305121 + 343396 = 2511^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 6648517 - 2¹⁹ = 6124229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6645517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324258 + 3324259.

It is an arithmetic number, because the mean of its divisors is an integer number (3324259).

Almost surely, 2^6648517 is an apocalyptic number.

It is an amenable number.

6648517 is a deficient number, since it is larger than the sum of its proper divisors (1).

6648517 is an equidigital number, since it uses as much as digits as its factorization.

6648517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 6648517 is about 2578.4718342460. The cubic root of 6648517 is about 188.0362556454.

The spelling of 6648517 in words is "six million, six hundred forty-eight thousand, five hundred seventeen".