12446666669 has 4 divisors (see below), whose sum is σ = 12477706140. Its totient is φ = 12415627200.

The previous prime is 12446666657. The next prime is 12446666681. The reversal of 12446666669 is 96666664421.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12446666657) and next prime (12446666681).

It can be written as a sum of positive squares in 2 ways, for example, as 9557604169 + 2889062500 = 97763^2 + 53750^2 .

It is a cyclic number.

It is not a de Polignac number, because 12446666669 - 2⁸ = 12446666413 is a prime.

It is a super-2 number, since 2×12446666669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12446666069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15519134 + ... + 15519935.

It is an arithmetic number, because the mean of its divisors is an integer number (3119426535).

Almost surely, 2^12446666669 is an apocalyptic number.

It is an amenable number.

12446666669 is a deficient number, since it is larger than the sum of its proper divisors (31039471).

12446666669 is an equidigital number, since it uses as much as digits as its factorization.

12446666669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31039470.

The product of its digits is 13436928, while the sum is 56.

The spelling of 12446666669 in words is "twelve billion, four hundred forty-six million, six hundred sixty-six thousand, six hundred sixty-nine".