6565659725 has 12 divisors (see below), whose sum is σ = 8404045440. Its totient is φ = 5083090800.

The previous prime is 6565659721. The next prime is 6565659761. The reversal of 6565659725 is 5279565656.

It is not a de Polignac number, because 6565659725 - 2² = 6565659721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565659721) 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, 4235135 + ... + 4236684.

It is an arithmetic number, because the mean of its divisors is an integer number (700337120).

Almost surely, 2^6565659725 is an apocalyptic number.

It is an amenable number.

6565659725 is a deficient number, since it is larger than the sum of its proper divisors (1838385715).

6565659725 is a wasteful number, since it uses less digits than its factorization.

6565659725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8471860 (or 8471855 counting only the distinct ones).

The product of its digits is 17010000, while the sum is 56.

The square root of 6565659725 is about 81028.7586292669. The cubic root of 6565659725 is about 1872.5185283041.

The spelling of 6565659725 in words is "six billion, five hundred sixty-five million, six hundred fifty-nine thousand, seven hundred twenty-five".