12345666654289 has 2 divisors, whose sum is σ = 12345666654290. Its totient is φ = 12345666654288.

The previous prime is 12345666654283. The next prime is 12345666654301. The reversal of 12345666654289 is 98245666654321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12313923174400 + 31743479889 = 3509120^2 + 178167^2 .

It is a cyclic number.

It is not a de Polignac number, because 12345666654289 - 2⁷ = 12345666654161 is a prime.

It is not a weakly prime, because it can be changed into another prime (12345666654283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172833327144 + 6172833327145.

It is an arithmetic number, because the mean of its divisors is an integer number (6172833327145).

Almost surely, 2^{12345666654289} is an apocalyptic number.

It is an amenable number.

12345666654289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345666654289 is an equidigital number, since it uses as much as digits as its factorization.

12345666654289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 447897600, while the sum is 67.

The spelling of 12345666654289 in words is "twelve trillion, three hundred forty-five billion, six hundred sixty-six million, six hundred fifty-four thousand, two hundred eighty-nine".