13666356 has 36 divisors (see below), whose sum is σ = 37687104. Its totient is φ = 4141200.

The previous prime is 13666321. The next prime is 13666369. The reversal of 13666356 is 65366631.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13666356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16860 + ... + 17651.

It is an arithmetic number, because the mean of its divisors is an integer number (1046864).

Almost surely, 2^13666356 is an apocalyptic number.

It is an amenable number.

13666356 is an abundant number, since it is smaller than the sum of its proper divisors (24020748).

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

13666356 is a wasteful number, since it uses less digits than its factorization.

13666356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34532 (or 34527 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 13666356 is about 3696.8034840927. The cubic root of 13666356 is about 239.0842183780.

The spelling of 13666356 in words is "thirteen million, six hundred sixty-six thousand, three hundred fifty-six".