6725561671 has 2 divisors, whose sum is σ = 6725561672. Its totient is φ = 6725561670.

The previous prime is 6725561663. The next prime is 6725561681. The reversal of 6725561671 is 1761655276.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6725561671 - 2³ = 6725561663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6725561611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3362780835 + 3362780836.

It is an arithmetic number, because the mean of its divisors is an integer number (3362780836).

Almost surely, 2^6725561671 is an apocalyptic number.

6725561671 is a deficient number, since it is larger than the sum of its proper divisors (1).

6725561671 is an equidigital number, since it uses as much as digits as its factorization.

6725561671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 46.

The square root of 6725561671 is about 82009.5218313093. The cubic root of 6725561671 is about 1887.5980490037.

The spelling of 6725561671 in words is "six billion, seven hundred twenty-five million, five hundred sixty-one thousand, six hundred seventy-one".