6663407 has 2 divisors, whose sum is σ = 6663408. Its totient is φ = 6663406.

The previous prime is 6663389. The next prime is 6663431. The reversal of 6663407 is 7043666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6663407 - 2²⁰ = 5614831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6663487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331703 + 3331704.

It is an arithmetic number, because the mean of its divisors is an integer number (3331704).

Almost surely, 2^6663407 is an apocalyptic number.

6663407 is a deficient number, since it is larger than the sum of its proper divisors (1).

6663407 is an equidigital number, since it uses as much as digits as its factorization.

6663407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 6663407 is about 2581.3575885568. The cubic root of 6663407 is about 188.1765261376.

The spelling of 6663407 in words is "six million, six hundred sixty-three thousand, four hundred seven".