6667429 has 2 divisors, whose sum is σ = 6667430. Its totient is φ = 6667428.

The previous prime is 6667403. The next prime is 6667439. The reversal of 6667429 is 9247666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5808100 + 859329 = 2410^2 + 927^2 .

It is a cyclic number.

It is not a de Polignac number, because 6667429 - 2⁷ = 6667301 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6667391 and 6667400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6667439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333714 + 3333715.

It is an arithmetic number, because the mean of its divisors is an integer number (3333715).

Almost surely, 2^6667429 is an apocalyptic number.

It is an amenable number.

6667429 is a deficient number, since it is larger than the sum of its proper divisors (1).

6667429 is an equidigital number, since it uses as much as digits as its factorization.

6667429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 6667429 is about 2582.1365184668. The cubic root of 6667429 is about 188.2143793341.

The spelling of 6667429 in words is "six million, six hundred sixty-seven thousand, four hundred twenty-nine".