12505146163066 has 4 divisors (see below), whose sum is σ = 18757719244602. Its totient is φ = 6252573081532.

The previous prime is 12505146163063. The next prime is 12505146163067. The reversal of 12505146163066 is 66036164150521.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 12356778678841 + 148367484225 = 3515221^2 + 385185^2 .

It is not an unprimeable number, because it can be changed into a prime (12505146163063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3126286540765 + ... + 3126286540768.

Almost surely, 2^{12505146163066} is an apocalyptic number.

12505146163066 is a deficient number, since it is larger than the sum of its proper divisors (6252573081536).

12505146163066 is an equidigital number, since it uses as much as digits as its factorization.

12505146163066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6252573081535.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 12505146163066 in words is "twelve trillion, five hundred five billion, one hundred forty-six million, one hundred sixty-three thousand, sixty-six".