6616139 has 2 divisors, whose sum is σ = 6616140. Its totient is φ = 6616138.

The previous prime is 6616117. The next prime is 6616151. The reversal of 6616139 is 9316166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6616139 - 2²⁰ = 5567563 is a prime.

It is not a weakly prime, because it can be changed into another prime (6616189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3308069 + 3308070.

It is an arithmetic number, because the mean of its divisors is an integer number (3308070).

Almost surely, 2^6616139 is an apocalyptic number.

6616139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6616139 is an equidigital number, since it uses as much as digits as its factorization.

6616139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 32.

The square root of 6616139 is about 2572.1856464882. The cubic root of 6616139 is about 187.7305158909.

The spelling of 6616139 in words is "six million, six hundred sixteen thousand, one hundred thirty-nine".