6725565685 has 4 divisors (see below), whose sum is σ = 8070678828. Its totient is φ = 5380452544.

The previous prime is 6725565607. The next prime is 6725565689. The reversal of 6725565685 is 5865655276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1470185649 + 5255380036 = 38343^2 + 72494^2 .

It is a cyclic number.

It is not a de Polignac number, because 6725565685 - 2⁹ = 6725565173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6725565689) 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, 672556564 + ... + 672556573.

It is an arithmetic number, because the mean of its divisors is an integer number (2017669707).

Almost surely, 2^6725565685 is an apocalyptic number.

It is an amenable number.

6725565685 is a deficient number, since it is larger than the sum of its proper divisors (1345113143).

6725565685 is a wasteful number, since it uses less digits than its factorization.

6725565685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345113142.

The product of its digits is 15120000, while the sum is 55.

The square root of 6725565685 is about 82009.5463040736. The cubic root of 6725565685 is about 1887.5984245270.

The spelling of 6725565685 in words is "six billion, seven hundred twenty-five million, five hundred sixty-five thousand, six hundred eighty-five".