6648751 has 4 divisors (see below), whose sum is σ = 7039872. Its totient is φ = 6257632.

The previous prime is 6648749. The next prime is 6648757. The reversal of 6648751 is 1578466.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6648751 - 2¹ = 6648749 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6648751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6648757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195535 + ... + 195568.

It is an arithmetic number, because the mean of its divisors is an integer number (1759968).

Almost surely, 2^6648751 is an apocalyptic number.

6648751 is a deficient number, since it is larger than the sum of its proper divisors (391121).

6648751 is a wasteful number, since it uses less digits than its factorization.

6648751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391120.

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

The square root of 6648751 is about 2578.5172095606. The cubic root of 6648751 is about 188.0384616495.

The spelling of 6648751 in words is "six million, six hundred forty-eight thousand, seven hundred fifty-one".