12666299125 has 16 divisors (see below), whose sum is σ = 16193097648. Its totient is φ = 9885888000.

The previous prime is 12666299101. The next prime is 12666299197. The reversal of 12666299125 is 52199266621.

It can be written as a sum of positive squares in 8 ways, for example, as 2972321361 + 9693977764 = 54519^2 + 98458^2 .

It is not a de Polignac number, because 12666299125 - 2¹³ = 12666290933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230612 + ... + 1240861.

It is an arithmetic number, because the mean of its divisors is an integer number (1012068603).

Almost surely, 2^12666299125 is an apocalyptic number.

It is an amenable number.

12666299125 is a deficient number, since it is larger than the sum of its proper divisors (3526798523).

12666299125 is an equidigital number, since it uses as much as digits as its factorization.

12666299125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471529 (or 2471519 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The spelling of 12666299125 in words is "twelve billion, six hundred sixty-six million, two hundred ninety-nine thousand, one hundred twenty-five".