6525661 has 2 divisors, whose sum is σ = 6525662. Its totient is φ = 6525660.

The previous prime is 6525647. The next prime is 6525677. The reversal of 6525661 is 1665256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4756761 + 1768900 = 2181^2 + 1330^2 .

It is a cyclic number.

It is not a de Polignac number, because 6525661 - 2⁹ = 6525149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6525611) 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 as a sum of consecutive naturals, namely, 3262830 + 3262831.

It is an arithmetic number, because the mean of its divisors is an integer number (3262831).

Almost surely, 2^6525661 is an apocalyptic number.

It is an amenable number.

6525661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6525661 is an equidigital number, since it uses as much as digits as its factorization.

6525661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 6525661 is about 2554.5373358008. The cubic root of 6525661 is about 186.8708250280.

The spelling of 6525661 in words is "six million, five hundred twenty-five thousand, six hundred sixty-one".