12705066217 has 16 divisors (see below), whose sum is σ = 13049856000. Its totient is φ = 12365743104.

The previous prime is 12705066211. The next prime is 12705066239. The reversal of 12705066217 is 71266050721.

It is a cyclic number.

It is not a de Polignac number, because 12705066217 - 2¹⁹ = 12704541929 is a prime.

It is a super-2 number, since 2×12705066217² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12705066211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2479384 + ... + 2484502.

It is an arithmetic number, because the mean of its divisors is an integer number (815616000).

Almost surely, 2^12705066217 is an apocalyptic number.

It is an amenable number.

12705066217 is a deficient number, since it is larger than the sum of its proper divisors (344789783).

12705066217 is an equidigital number, since it uses as much as digits as its factorization.

12705066217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5640.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 12705066217 in words is "twelve billion, seven hundred five million, sixty-six thousand, two hundred seventeen".