6667399 has 2 divisors, whose sum is σ = 6667400. Its totient is φ = 6667398.

The previous prime is 6667393. The next prime is 6667403. The reversal of 6667399 is 9937666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6667399 - 2¹³ = 6659207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6667393) 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, 3333699 + 3333700.

It is an arithmetic number, because the mean of its divisors is an integer number (3333700).

Almost surely, 2^6667399 is an apocalyptic number.

6667399 is a deficient number, since it is larger than the sum of its proper divisors (1).

6667399 is an equidigital number, since it uses as much as digits as its factorization.

6667399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 46.

The square root of 6667399 is about 2582.1307093174. The cubic root of 6667399 is about 188.2140970444.

The spelling of 6667399 in words is "six million, six hundred sixty-seven thousand, three hundred ninety-nine".