6664012447 has 2 divisors, whose sum is σ = 6664012448. Its totient is φ = 6664012446.

The previous prime is 6664012409. The next prime is 6664012451. The reversal of 6664012447 is 7442104666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6664012447 - 2⁷ = 6664012319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6664015447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332006223 + 3332006224.

It is an arithmetic number, because the mean of its divisors is an integer number (3332006224).

Almost surely, 2^6664012447 is an apocalyptic number.

6664012447 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664012447 is an equidigital number, since it uses as much as digits as its factorization.

6664012447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 6664012447 is about 81633.4027650447. The cubic root of 6664012447 is about 1881.8222529738.

The spelling of 6664012447 in words is "six billion, six hundred sixty-four million, twelve thousand, four hundred forty-seven".