13666743 has 12 divisors (see below), whose sum is σ = 20421960. Its totient is φ = 8796816.

The previous prime is 13666729. The next prime is 13666769. The reversal of 13666743 is 34766631.

It is a happy number.

13666743 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13666743 - 2⁵ = 13666711 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13666698 and 13666707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13666843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25921 + ... + 26442.

It is an arithmetic number, because the mean of its divisors is an integer number (1701830).

Almost surely, 2^13666743 is an apocalyptic number.

13666743 is a deficient number, since it is larger than the sum of its proper divisors (6755217).

13666743 is a wasteful number, since it uses less digits than its factorization.

13666743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52398 (or 52395 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 13666743 is about 3696.8558262394. The cubic root of 13666743 is about 239.0864751298.

The spelling of 13666743 in words is "thirteen million, six hundred sixty-six thousand, seven hundred forty-three".