6648457 has 2 divisors, whose sum is σ = 6648458. Its totient is φ = 6648456.

The previous prime is 6648431. The next prime is 6648487. The reversal of 6648457 is 7548466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6610041 + 38416 = 2571^2 + 196^2 .

It is a cyclic number.

It is not a de Polignac number, because 6648457 - 2¹⁹ = 6124169 is a prime.

It is a Chen prime.

6648457 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6648407) by changing a digit.

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 as a sum of consecutive naturals, namely, 3324228 + 3324229.

It is an arithmetic number, because the mean of its divisors is an integer number (3324229).

Almost surely, 2^6648457 is an apocalyptic number.

It is an amenable number.

6648457 is a deficient number, since it is larger than the sum of its proper divisors (1).

6648457 is an equidigital number, since it uses as much as digits as its factorization.

6648457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 40.

The square root of 6648457 is about 2578.4601994214. The cubic root of 6648457 is about 188.0356899950.

Subtracting 6648457 from its reverse (7548466), we obtain a palindrome (900009).

The spelling of 6648457 in words is "six million, six hundred forty-eight thousand, four hundred fifty-seven".