6544667 has 2 divisors, whose sum is σ = 6544668. Its totient is φ = 6544666.

The previous prime is 6544663. The next prime is 6544739. The reversal of 6544667 is 7664456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6544667 - 2² = 6544663 is a prime.

It is a super-2 number, since 2×6544667² = 85665332281778, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6544667.

It is not a weakly prime, because it can be changed into another prime (6544663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3272333 + 3272334.

It is an arithmetic number, because the mean of its divisors is an integer number (3272334).

Almost surely, 2^6544667 is an apocalyptic number.

6544667 is a deficient number, since it is larger than the sum of its proper divisors (1).

6544667 is an equidigital number, since it uses as much as digits as its factorization.

6544667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 38.

The square root of 6544667 is about 2558.2546784869. The cubic root of 6544667 is about 187.0520697269.

The spelling of 6544667 in words is "six million, five hundred forty-four thousand, six hundred sixty-seven".