6662879 has 2 divisors, whose sum is σ = 6662880. Its totient is φ = 6662878.

The previous prime is 6662857. The next prime is 6662881. The reversal of 6662879 is 9782666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6662879 is a prime.

It is a Sophie Germain prime.

Together with 6662881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6662809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331439 + 3331440.

It is an arithmetic number, because the mean of its divisors is an integer number (3331440).

Almost surely, 2^6662879 is an apocalyptic number.

6662879 is a deficient number, since it is larger than the sum of its proper divisors (1).

6662879 is an equidigital number, since it uses as much as digits as its factorization.

6662879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 6662879 is about 2581.2553147645. The cubic root of 6662879 is about 188.1715557158.

The spelling of 6662879 in words is "six million, six hundred sixty-two thousand, eight hundred seventy-nine".