1366441685 has 16 divisors (see below), whose sum is σ = 1912224000. Its totient is φ = 936987408.

The previous prime is 1366441621. The next prime is 1366441693. The reversal of 1366441685 is 5861446631.

It is not a de Polignac number, because 1366441685 - 2⁶ = 1366441621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396665 + ... + 400094.

It is an arithmetic number, because the mean of its divisors is an integer number (119514000).

Almost surely, 2^1366441685 is an apocalyptic number.

It is an amenable number.

1366441685 is a deficient number, since it is larger than the sum of its proper divisors (545782315).

1366441685 is an frugal number, since it uses more digits than its factorization.

1366441685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796785 (or 796771 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The square root of 1366441685 is about 36965.4120090660. The cubic root of 1366441685 is about 1109.6781484414.

The spelling of 1366441685 in words is "one billion, three hundred sixty-six million, four hundred forty-one thousand, six hundred eighty-five".