6664446502409 has 64 divisors (see below), whose sum is σ = 7421185474560. Its totient is φ = 5963790792960.

The previous prime is 6664446502397. The next prime is 6664446502453. The reversal of 6664446502409 is 9042056444666.

It is not a de Polignac number, because 6664446502409 - 2⁴ = 6664446502393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6664446502709) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1294818974 + ... + 1294824120.

It is an arithmetic number, because the mean of its divisors is an integer number (115956023040).

Almost surely, 2^{6664446502409} is an apocalyptic number.

It is an amenable number.

6664446502409 is a deficient number, since it is larger than the sum of its proper divisors (756738972151).

6664446502409 is a wasteful number, since it uses less digits than its factorization.

6664446502409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5670.

The product of its (nonzero) digits is 29859840, while the sum is 56.

The spelling of 6664446502409 in words is "six trillion, six hundred sixty-four billion, four hundred forty-six million, five hundred two thousand, four hundred nine".