6520060625 has 40 divisors (see below), whose sum is σ = 8808911496. Its totient is φ = 4795776000.

The previous prime is 6520060619. The next prime is 6520060649. The reversal of 6520060625 is 5260600256.

It can be written as a sum of positive squares in 20 ways, for example, as 5096960449 + 1423100176 = 71393^2 + 37724^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6520060625 is a prime.

It is a super-2 number, since 2×6520060625² = 85022381107350781250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6520060591 and 6520060600.

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 39 ways as a sum of consecutive naturals, for example, 2249177 + ... + 2252073.

Almost surely, 2^6520060625 is an apocalyptic number.

6520060625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6520060625 is a deficient number, since it is larger than the sum of its proper divisors (2288850871).

6520060625 is a wasteful number, since it uses less digits than its factorization.

6520060625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207 (or 3192 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 6520060625 is about 80746.8923550622. The cubic root of 6520060625 is about 1868.1735171066.

The spelling of 6520060625 in words is "six billion, five hundred twenty million, sixty thousand, six hundred twenty-five".