1366494665 has 16 divisors (see below), whose sum is σ = 1663984128. Its totient is φ = 1077100416.

The previous prime is 1366494659. The next prime is 1366494677. The reversal of 1366494665 is 5664946631.

It is a cyclic number.

It is not a de Polignac number, because 1366494665 - 2³⁰ = 292752841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636584 + ... + 638726.

It is an arithmetic number, because the mean of its divisors is an integer number (103999008).

Almost surely, 2^1366494665 is an apocalyptic number.

It is an amenable number.

1366494665 is a deficient number, since it is larger than the sum of its proper divisors (297489463).

1366494665 is a wasteful number, since it uses less digits than its factorization.

1366494665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968.

The product of its digits is 2799360, while the sum is 50.

The square root of 1366494665 is about 36966.1286179659. The cubic root of 1366494665 is about 1109.6924898239.

The spelling of 1366494665 in words is "one billion, three hundred sixty-six million, four hundred ninety-four thousand, six hundred sixty-five".