13666434 has 16 divisors (see below), whose sum is σ = 28771680. Its totient is φ = 4315680.

The previous prime is 13666417. The next prime is 13666441. The reversal of 13666434 is 43466631.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13666395 and 13666404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59827 + ... + 60054.

It is an arithmetic number, because the mean of its divisors is an integer number (1798230).

Almost surely, 2^13666434 is an apocalyptic number.

13666434 is an abundant number, since it is smaller than the sum of its proper divisors (15105246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13666434 is a wasteful number, since it uses less digits than its factorization.

13666434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119905.

The product of its digits is 31104, while the sum is 33.

The square root of 13666434 is about 3696.8140337323. The cubic root of 13666434 is about 239.0846732306.

The spelling of 13666434 in words is "thirteen million, six hundred sixty-six thousand, four hundred thirty-four".