13666872 has 32 divisors (see below), whose sum is σ = 34264080. Its totient is φ = 4542720.

The previous prime is 13666847. The next prime is 13666879. The reversal of 13666872 is 27866631.

It is a self number, because there is not a number n which added to its sum of digits gives 13666872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13666879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11958 + ... + 13050.

Almost surely, 2^13666872 is an apocalyptic number.

13666872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13666872 is an abundant number, since it is smaller than the sum of its proper divisors (20597208).

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

13666872 is a wasteful number, since it uses less digits than its factorization.

13666872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623 (or 1619 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 13666872 is about 3696.8732734569. The cubic root of 13666872 is about 239.0872273709.

The spelling of 13666872 in words is "thirteen million, six hundred sixty-six thousand, eight hundred seventy-two".