12661337259674 has 8 divisors (see below), whose sum is σ = 18995824928340. Its totient is φ = 6329395616896.

The previous prime is 12661337259617. The next prime is 12661337259707. The reversal of 12661337259674 is 47695273316621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12233156793649 + 428180466025 = 3497593^2 + 654355^2 .

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

It is a super-2 number, since 2×12661337259674² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636494039 + ... + 636513930.

Almost surely, 2^{12661337259674} is an apocalyptic number.

12661337259674 is a deficient number, since it is larger than the sum of its proper divisors (6334487668666).

12661337259674 is a wasteful number, since it uses less digits than its factorization.

12661337259674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273012944.

The product of its digits is 68584320, while the sum is 62.

The spelling of 12661337259674 in words is "twelve trillion, six hundred sixty-one billion, three hundred thirty-seven million, two hundred fifty-nine thousand, six hundred seventy-four".