12664342451 has 4 divisors (see below), whose sum is σ = 12776416392. Its totient is φ = 12552268512.

The previous prime is 12664342447. The next prime is 12664342477. The reversal of 12664342451 is 15424346621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15424346621 = 37 ⋅416874233.

It is a cyclic number.

It is not a de Polignac number, because 12664342451 - 2² = 12664342447 is a prime.

It is a super-3 number, since 3×12664342451³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12664342051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56036801 + ... + 56037026.

It is an arithmetic number, because the mean of its divisors is an integer number (3194104098).

Almost surely, 2^12664342451 is an apocalyptic number.

12664342451 is a deficient number, since it is larger than the sum of its proper divisors (112073941).

12664342451 is a wasteful number, since it uses less digits than its factorization.

12664342451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112073940.

The product of its digits is 138240, while the sum is 38.

The spelling of 12664342451 in words is "twelve billion, six hundred sixty-four million, three hundred forty-two thousand, four hundred fifty-one".