6646110139 has 2 divisors, whose sum is σ = 6646110140. Its totient is φ = 6646110138.

The previous prime is 6646110137. The next prime is 6646110157. The reversal of 6646110139 is 9310116466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6646110139 - 2¹ = 6646110137 is a prime.

Together with 6646110137, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 6646110098 and 6646110107.

It is not a weakly prime, because it can be changed into another prime (6646110131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323055069 + 3323055070.

It is an arithmetic number, because the mean of its divisors is an integer number (3323055070).

Almost surely, 2^6646110139 is an apocalyptic number.

6646110139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646110139 is an equidigital number, since it uses as much as digits as its factorization.

6646110139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 6646110139 is about 81523.6783946848. The cubic root of 6646110139 is about 1880.1356227609.

The spelling of 6646110139 in words is "six billion, six hundred forty-six million, one hundred ten thousand, one hundred thirty-nine".