12664721723207 has 8 divisors (see below), whose sum is σ = 12731285026560. Its totient is φ = 12598161085440.

The previous prime is 12664721723201. The next prime is 12664721723219. The reversal of 12664721723207 is 70232712746621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12664721723207 - 2²⁸ = 12664453287751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664721723201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9247463 + ... + 10528295.

It is an arithmetic number, because the mean of its divisors is an integer number (1591410628320).

Almost surely, 2^{12664721723207} is an apocalyptic number.

12664721723207 is a deficient number, since it is larger than the sum of its proper divisors (66563303353).

12664721723207 is a wasteful number, since it uses less digits than its factorization.

12664721723207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332793.

The product of its (nonzero) digits is 2370816, while the sum is 50.

The spelling of 12664721723207 in words is "twelve trillion, six hundred sixty-four billion, seven hundred twenty-one million, seven hundred twenty-three thousand, two hundred seven".