12717339661 has 8 divisors (see below), whose sum is σ = 13704790680. Its totient is φ = 11731202112.

The previous prime is 12717339641. The next prime is 12717339683. The reversal of 12717339661 is 16693371721.

It can be written as a sum of positive squares in 4 ways, for example, as 219217636 + 12498122025 = 14806^2 + 111795^2 .

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 12717339661 - 2¹⁹ = 12716815373 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 (12717339631) 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, 308206 + ... + 347023.

It is an arithmetic number, because the mean of its divisors is an integer number (1713098835).

Almost surely, 2^12717339661 is an apocalyptic number.

It is an amenable number.

12717339661 is a deficient number, since it is larger than the sum of its proper divisors (987451019).

12717339661 is a wasteful number, since it uses less digits than its factorization.

12717339661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656735.

The product of its digits is 285768, while the sum is 46.

The spelling of 12717339661 in words is "twelve billion, seven hundred seventeen million, three hundred thirty-nine thousand, six hundred sixty-one".