1366066439 has 4 divisors (see below), whose sum is σ = 1425460656. Its totient is φ = 1306672224.

The previous prime is 1366066411. The next prime is 1366066487. The reversal of 1366066439 is 9346606631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9346606631 = 367 ⋅25467593.

It is a cyclic number.

It is not a de Polignac number, because 1366066439 - 2²⁴ = 1349289223 is a prime.

It is a super-2 number, since 2×1366066439² = 3732275031524281442, which contains 22 as substring.

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 1366066439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366066409) 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, 29697074 + ... + 29697119.

It is an arithmetic number, because the mean of its divisors is an integer number (356365164).

Almost surely, 2^1366066439 is an apocalyptic number.

1366066439 is a deficient number, since it is larger than the sum of its proper divisors (59394217).

1366066439 is an equidigital number, since it uses as much as digits as its factorization.

1366066439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59394216.

The product of its (nonzero) digits is 419904, while the sum is 44.

The square root of 1366066439 is about 36960.3360239054. The cubic root of 1366066439 is about 1109.5765608865.

The spelling of 1366066439 in words is "one billion, three hundred sixty-six million, sixty-six thousand, four hundred thirty-nine".