6456679 has 2 divisors, whose sum is σ = 6456680. Its totient is φ = 6456678.

The previous prime is 6456661. The next prime is 6456691. The reversal of 6456679 is 9766546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6456679 - 2⁷ = 6456551 is a prime.

It is a super-3 number, since 3×6456679³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6456479) 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, 3228339 + 3228340.

It is an arithmetic number, because the mean of its divisors is an integer number (3228340).

Almost surely, 2^6456679 is an apocalyptic number.

6456679 is a deficient number, since it is larger than the sum of its proper divisors (1).

6456679 is an equidigital number, since it uses as much as digits as its factorization.

6456679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 43.

The square root of 6456679 is about 2540.9996064541. Note that the first 3 decimals coincide. The cubic root of 6456679 is about 186.2100279068.

The spelling of 6456679 in words is "six million, four hundred fifty-six thousand, six hundred seventy-nine".