1366366952889 has 27 divisors (see below), whose sum is σ = 2039523000879. Its totient is φ = 881456931360.

The previous prime is 1366366952879. The next prime is 1366366952903. The reversal of 1366366952889 is 9882596636631.

The square root of 1366366952889 is 1168917.

It is a perfect power (a square), and thus also a powerful number.

1366366952889 is a `hidden beast` number, since 1 + 3 + 6 + 6 + 36 + 69 + 528 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1355517647289 + 10849305600 = 1164267^2 + 104160^2 .

It is not a de Polignac number, because 1366366952889 - 2⁵ = 1366366952857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1366366952849) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 108702997 + ... + 108715565.

Almost surely, 2^{1366366952889} is an apocalyptic number.

1366366952889 is the 1168917-th square number.

1366366952889 is the 584459-th centered octagonal number.

It is an amenable number.

1366366952889 is a deficient number, since it is larger than the sum of its proper divisors (673156047990).

1366366952889 is an frugal number, since it uses more digits than its factorization.

1366366952889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25206 (or 12603 counting only the distinct ones).

The product of its digits is 604661760, while the sum is 72.

The spelling of 1366366952889 in words is "one trillion, three hundred sixty-six billion, three hundred sixty-six million, nine hundred fifty-two thousand, eight hundred eighty-nine".