6516648 has 48 divisors (see below), whose sum is σ = 18263700. Its totient is φ = 2096640.

The previous prime is 6516647. The next prime is 6516649. The reversal of 6516648 is 8466156.

6516648 is a `hidden beast` number, since 6 + 5 + 1 + 6 + 648 = 666.

It is an interprime number because it is at equal distance from previous prime (6516647) and next prime (6516649).

It can be written as a sum of positive squares in 2 ways, for example, as 5673924 + 842724 = 2382^2 + 918^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6516647) 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 11 ways as a sum of consecutive naturals, for example, 528 + ... + 3648.

Almost surely, 2^6516648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6516648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9131850).

6516648 is an abundant number, since it is smaller than the sum of its proper divisors (11747052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6516648 is a wasteful number, since it uses less digits than its factorization.

6516648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162 (or 3155 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 6516648 is about 2552.7726103200. The cubic root of 6516648 is about 186.7847523805.

The spelling of 6516648 in words is "six million, five hundred sixteen thousand, six hundred forty-eight".