13518666 has 48 divisors (see below), whose sum is σ = 34564608. Its totient is φ = 3736800.

The previous prime is 13518649. The next prime is 13518679. The reversal of 13518666 is 66681531.

It is a happy number.

13518666 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 a self number, because there is not a number n which added to its sum of digits gives 13518666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2176 + ... + 5636.

It is an arithmetic number, because the mean of its divisors is an integer number (720096).

Almost surely, 2^13518666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13518666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17282304).

13518666 is an abundant number, since it is smaller than the sum of its proper divisors (21045942).

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

13518666 is a wasteful number, since it uses less digits than its factorization.

13518666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507 (or 3504 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 13518666 is about 3676.7738576094. The cubic root of 13518666 is about 238.2198495811.

The spelling of 13518666 in words is "thirteen million, five hundred eighteen thousand, six hundred sixty-six".