1366381441 has 4 divisors (see below), whose sum is σ = 1382843952. Its totient is φ = 1349918932.

The previous prime is 1366381427. The next prime is 1366381453. The reversal of 1366381441 is 1441836631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1366381441 - 2²⁵ = 1332827009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1366381441.

It is not an unprimeable number, because it can be changed into a prime (1366381421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8231131 + ... + 8231296.

It is an arithmetic number, because the mean of its divisors is an integer number (345710988).

Almost surely, 2^1366381441 is an apocalyptic number.

It is an amenable number.

1366381441 is a deficient number, since it is larger than the sum of its proper divisors (16462511).

1366381441 is an equidigital number, since it uses as much as digits as its factorization.

1366381441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16462510.

The product of its digits is 41472, while the sum is 37.

The square root of 1366381441 is about 36964.5971302272. The cubic root of 1366381441 is about 1109.6618402853.

The spelling of 1366381441 in words is "one billion, three hundred sixty-six million, three hundred eighty-one thousand, four hundred forty-one".