13666774 has 8 divisors (see below), whose sum is σ = 22363848. Its totient is φ = 6212160.

The previous prime is 13666769. The next prime is 13666787. The reversal of 13666774 is 47766631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310587 + ... + 310630.

It is an arithmetic number, because the mean of its divisors is an integer number (2795481).

Almost surely, 2^13666774 is an apocalyptic number.

13666774 is a deficient number, since it is larger than the sum of its proper divisors (8697074).

13666774 is a wasteful number, since it uses less digits than its factorization.

13666774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621230.

The product of its digits is 127008, while the sum is 40.

The square root of 13666774 is about 3696.8600189891. The cubic root of 13666774 is about 239.0866559013.

The spelling of 13666774 in words is "thirteen million, six hundred sixty-six thousand, seven hundred seventy-four".