12405666659 has 2 divisors, whose sum is σ = 12405666660. Its totient is φ = 12405666658.

The previous prime is 12405666613. The next prime is 12405666667. The reversal of 12405666659 is 95666650421.

It is a strong prime.

It is an emirp because it is prime and its reverse (95666650421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12405666659 - 2¹⁶ = 12405601123 is a prime.

It is a super-3 number, since 3×12405666659³ (a number of 31 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12405666359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6202833329 + 6202833330.

It is an arithmetic number, because the mean of its divisors is an integer number (6202833330).

Almost surely, 2^12405666659 is an apocalyptic number.

12405666659 is a deficient number, since it is larger than the sum of its proper divisors (1).

12405666659 is an equidigital number, since it uses as much as digits as its factorization.

12405666659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 12405666659 in words is "twelve billion, four hundred five million, six hundred sixty-six thousand, six hundred fifty-nine".