6613725161 has 2 divisors, whose sum is σ = 6613725162. Its totient is φ = 6613725160.

The previous prime is 6613725121. The next prime is 6613725197. The reversal of 6613725161 is 1615273166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4978008025 + 1635717136 = 70555^2 + 40444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6613725161 is a prime.

It is not a weakly prime, because it can be changed into another prime (6613725121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3306862580 + 3306862581.

It is an arithmetic number, because the mean of its divisors is an integer number (3306862581).

Almost surely, 2^6613725161 is an apocalyptic number.

It is an amenable number.

6613725161 is a deficient number, since it is larger than the sum of its proper divisors (1).

6613725161 is an equidigital number, since it uses as much as digits as its factorization.

6613725161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 6613725161 is about 81324.8127019054. The cubic root of 6613725161 is about 1877.0768251522.

The spelling of 6613725161 in words is "six billion, six hundred thirteen million, seven hundred twenty-five thousand, one hundred sixty-one".