6639107 has 2 divisors, whose sum is σ = 6639108. Its totient is φ = 6639106.

The previous prime is 6639077. The next prime is 6639109. The reversal of 6639107 is 7019366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6639107 - 2⁸ = 6638851 is a prime.

Together with 6639109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6639109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3319553 + 3319554.

It is an arithmetic number, because the mean of its divisors is an integer number (3319554).

Almost surely, 2^6639107 is an apocalyptic number.

6639107 is a deficient number, since it is larger than the sum of its proper divisors (1).

6639107 is an equidigital number, since it uses as much as digits as its factorization.

6639107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 6639107 is about 2576.6464639139. The cubic root of 6639107 is about 187.9475011854.

The spelling of 6639107 in words is "six million, six hundred thirty-nine thousand, one hundred seven".