6520616 has 16 divisors (see below), whose sum is σ = 12266100. Its totient is φ = 3249664.

The previous prime is 6520609. The next prime is 6520691. The reversal of 6520616 is 6160256.

It can be written as a sum of positive squares in 2 ways, for example, as 6400900 + 119716 = 2530^2 + 346^2 .

It is a congruent number.

It is an unprimeable number.

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, 1670 + ... + 3978.

Almost surely, 2^6520616 is an apocalyptic number.

It is an amenable number.

6520616 is a deficient number, since it is larger than the sum of its proper divisors (5745484).

6520616 is a wasteful number, since it uses less digits than its factorization.

6520616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 6520616 is about 2553.5496862211. The cubic root of 6520616 is about 186.8226558914.

The spelling of 6520616 in words is "six million, five hundred twenty thousand, six hundred sixteen".