12664336443 has 8 divisors (see below), whose sum is σ = 18420853056. Its totient is φ = 7675355400.

The previous prime is 12664336417. The next prime is 12664336483. The reversal of 12664336443 is 34463346621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12664336443 - 2¹³ = 12664328251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12664336395 and 12664336404.

It is not an unprimeable number, because it can be changed into a prime (12664336483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191883853 + ... + 191883918.

It is an arithmetic number, because the mean of its divisors is an integer number (2302606632).

Almost surely, 2^12664336443 is an apocalyptic number.

12664336443 is a deficient number, since it is larger than the sum of its proper divisors (5756516613).

12664336443 is a wasteful number, since it uses less digits than its factorization.

12664336443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383767785.

The product of its digits is 746496, while the sum is 42.

The spelling of 12664336443 in words is "twelve billion, six hundred sixty-four million, three hundred thirty-six thousand, four hundred forty-three".