12432565120666 has 16 divisors (see below), whose sum is σ = 19365392121768. Its totient is φ = 5981588294400.

The previous prime is 12432565120649. The next prime is 12432565120727. The reversal of 12432565120666 is 66602156523421.

It can be written as a sum of positive squares in 4 ways, for example, as 6776801226441 + 5655763894225 = 2603229^2 + 2378185^2 .

It is a super-2 number, since 2×12432565120666² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038464205 + ... + 1038476176.

Almost surely, 2^{12432565120666} is an apocalyptic number.

12432565120666 is a deficient number, since it is larger than the sum of its proper divisors (6932827001102).

12432565120666 is a wasteful number, since it uses less digits than its factorization.

12432565120666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076940497.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 12432565120666 in words is "twelve trillion, four hundred thirty-two billion, five hundred sixty-five million, one hundred twenty thousand, six hundred sixty-six".