12706646737 has 2 divisors, whose sum is σ = 12706646738. Its totient is φ = 12706646736.

The previous prime is 12706646657. The next prime is 12706646741. The reversal of 12706646737 is 73764660721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10557768001 + 2148878736 = 102751^2 + 46356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12706646737 is a prime.

It is a super-2 number, since 2×12706646737² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12706646747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6353323368 + 6353323369.

It is an arithmetic number, because the mean of its divisors is an integer number (6353323369).

Almost surely, 2^12706646737 is an apocalyptic number.

It is an amenable number.

12706646737 is a deficient number, since it is larger than the sum of its proper divisors (1).

12706646737 is an equidigital number, since it uses as much as digits as its factorization.

12706646737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 49.

The spelling of 12706646737 in words is "twelve billion, seven hundred six million, six hundred forty-six thousand, seven hundred thirty-seven".