1329266866241 has 4 divisors (see below), whose sum is σ = 1329283713732. Its totient is φ = 1329250018752.

The previous prime is 1329266866229. The next prime is 1329266866243. The reversal of 1329266866241 is 1426686629231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 320889393841 + 1008377472400 = 566471^2 + 1004180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329266866241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1329266866243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8304836 + ... + 8463381.

It is an arithmetic number, because the mean of its divisors is an integer number (332320928433).

Almost surely, 2^{1329266866241} is an apocalyptic number.

It is an amenable number.

1329266866241 is a deficient number, since it is larger than the sum of its proper divisors (16847491).

1329266866241 is an equidigital number, since it uses as much as digits as its factorization.

1329266866241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16847490.

The product of its digits is 8957952, while the sum is 56.

The spelling of 1329266866241 in words is "one trillion, three hundred twenty-nine billion, two hundred sixty-six million, eight hundred sixty-six thousand, two hundred forty-one".