6426659 has 2 divisors, whose sum is σ = 6426660. Its totient is φ = 6426658.

The previous prime is 6426653. The next prime is 6426689. The reversal of 6426659 is 9566246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6426659 - 2⁸ = 6426403 is a prime.

It is not a weakly prime, because it can be changed into another prime (6426653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3213329 + 3213330.

It is an arithmetic number, because the mean of its divisors is an integer number (3213330).

Almost surely, 2^6426659 is an apocalyptic number.

6426659 is a deficient number, since it is larger than the sum of its proper divisors (1).

6426659 is an equidigital number, since it uses as much as digits as its factorization.

6426659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 6426659 is about 2535.0856001327. The cubic root of 6426659 is about 185.9209881390.

The spelling of 6426659 in words is "six million, four hundred twenty-six thousand, six hundred fifty-nine".