13266244666 has 4 divisors (see below), whose sum is σ = 19899367002. Its totient is φ = 6633122332.

The previous prime is 13266244643. The next prime is 13266244679. The reversal of 13266244666 is 66644266231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66644266231 = 1327 ⋅50221753.

It can be written as a sum of positive squares in only one way, i.e., 10031024025 + 3235220641 = 100155^2 + 56879^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3316561165 + ... + 3316561168.

Almost surely, 2^13266244666 is an apocalyptic number.

13266244666 is a deficient number, since it is larger than the sum of its proper divisors (6633122336).

13266244666 is an equidigital number, since it uses as much as digits as its factorization.

13266244666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6633122335.

The product of its digits is 1492992, while the sum is 46.

The spelling of 13266244666 in words is "thirteen billion, two hundred sixty-six million, two hundred forty-four thousand, six hundred sixty-six".