6616195549 has 2 divisors, whose sum is σ = 6616195550. Its totient is φ = 6616195548.

The previous prime is 6616195501. The next prime is 6616195583. The reversal of 6616195549 is 9455916166.

It is a happy number.

6616195549 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4490340100 + 2125855449 = 67010^2 + 46107^2 .

It is a cyclic number.

It is not a de Polignac number, because 6616195549 - 2⁹ = 6616195037 is a prime.

It is a super-2 number, since 2×6616195549² = 87548087085214822802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6616195496 and 6616195505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6616135549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3308097774 + 3308097775.

It is an arithmetic number, because the mean of its divisors is an integer number (3308097775).

Almost surely, 2^6616195549 is an apocalyptic number.

It is an amenable number.

6616195549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6616195549 is an equidigital number, since it uses as much as digits as its factorization.

6616195549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 52.

The square root of 6616195549 is about 81339.9996865011. Note that the first 3 decimals coincide. The cubic root of 6616195549 is about 1877.3105074171.

The spelling of 6616195549 in words is "six billion, six hundred sixteen million, one hundred ninety-five thousand, five hundred forty-nine".