6648249 has 4 divisors (see below), whose sum is σ = 8864336. Its totient is φ = 4432164.

The previous prime is 6648203. The next prime is 6648251. The reversal of 6648249 is 9428466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6648249 - 2⁷ = 6648121 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 6⁷ + 4⁷ + 8⁷ + 2⁷ + 4¹¹ + 9⁵ .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6648259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108039 + ... + 1108044.

It is an arithmetic number, because the mean of its divisors is an integer number (2216084).

Almost surely, 2^6648249 is an apocalyptic number.

It is an amenable number.

6648249 is a deficient number, since it is larger than the sum of its proper divisors (2216087).

6648249 is a wasteful number, since it uses less digits than its factorization.

6648249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216086.

The product of its digits is 82944, while the sum is 39.

The square root of 6648249 is about 2578.4198649561. The cubic root of 6648249 is about 188.0337290472.

The spelling of 6648249 in words is "six million, six hundred forty-eight thousand, two hundred forty-nine".