12660213624257 has 2 divisors, whose sum is σ = 12660213624258. Its totient is φ = 12660213624256.

The previous prime is 12660213624241. The next prime is 12660213624319. The reversal of 12660213624257 is 75242631206621.

12660213624257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12473886721921 + 186326902336 = 3531839^2 + 431656^2 .

It is a cyclic number.

It is not a de Polignac number, because 12660213624257 - 2⁴ = 12660213624241 is a prime.

It is not a weakly prime, because it can be changed into another prime (12660213624217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330106812128 + 6330106812129.

It is an arithmetic number, because the mean of its divisors is an integer number (6330106812129).

Almost surely, 2^{12660213624257} is an apocalyptic number.

It is an amenable number.

12660213624257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12660213624257 is an equidigital number, since it uses as much as digits as its factorization.

12660213624257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 12660213624257 in words is "twelve trillion, six hundred sixty billion, two hundred thirteen million, six hundred twenty-four thousand, two hundred fifty-seven".