12541126666 has 4 divisors (see below), whose sum is σ = 18811690002. Its totient is φ = 6270563332.

The previous prime is 12541126603. The next prime is 12541126667. The reversal of 12541126666 is 66662114521.

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., 12384351225 + 156775441 = 111285^2 + 12521^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12541126667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3135281665 + ... + 3135281668.

Almost surely, 2^12541126666 is an apocalyptic number.

12541126666 is a deficient number, since it is larger than the sum of its proper divisors (6270563336).

12541126666 is an equidigital number, since it uses as much as digits as its factorization.

12541126666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270563335.

The product of its digits is 103680, while the sum is 40.

The spelling of 12541126666 in words is "twelve billion, five hundred forty-one million, one hundred twenty-six thousand, six hundred sixty-six".