6635879 has 2 divisors, whose sum is σ = 6635880. Its totient is φ = 6635878.

The previous prime is 6635861. The next prime is 6635887. The reversal of 6635879 is 9785366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6635879 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6635179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3317939 + 3317940.

It is an arithmetic number, because the mean of its divisors is an integer number (3317940).

Almost surely, 2^6635879 is an apocalyptic number.

6635879 is a deficient number, since it is larger than the sum of its proper divisors (1).

6635879 is an equidigital number, since it uses as much as digits as its factorization.

6635879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 6635879 is about 2576.0199921584. The cubic root of 6635879 is about 187.9170355978.

The spelling of 6635879 in words is "six million, six hundred thirty-five thousand, eight hundred seventy-nine".