6726647 has 2 divisors, whose sum is σ = 6726648. Its totient is φ = 6726646.

The previous prime is 6726623. The next prime is 6726667. The reversal of 6726647 is 7466276.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6726647 - 2¹⁶ = 6661111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6726647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6726607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3363323 + 3363324.

It is an arithmetic number, because the mean of its divisors is an integer number (3363324).

Almost surely, 2^6726647 is an apocalyptic number.

6726647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6726647 is an equidigital number, since it uses as much as digits as its factorization.

6726647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 38.

The square root of 6726647 is about 2593.5780304437. The cubic root of 6726647 is about 188.7699579791.

The spelling of 6726647 in words is "six million, seven hundred twenty-six thousand, six hundred forty-seven".