6520816 has 20 divisors (see below), whose sum is σ = 12753400. Its totient is φ = 3229632.

The previous prime is 6520793. The next prime is 6520817. The reversal of 6520816 is 6180256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520817) 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, 126 + ... + 3613.

It is an arithmetic number, because the mean of its divisors is an integer number (637670).

Almost surely, 2^6520816 is an apocalyptic number.

It is an amenable number.

6520816 is a deficient number, since it is larger than the sum of its proper divisors (6232584).

6520816 is a wasteful number, since it uses less digits than its factorization.

6520816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856 (or 3850 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 6520816 is about 2553.5888470934. The cubic root of 6520816 is about 186.8245659436.

The spelling of 6520816 in words is "six million, five hundred twenty thousand, eight hundred sixteen".