13888666 has 16 divisors (see below), whose sum is σ = 22851648. Its totient is φ = 6278400.

The previous prime is 13888607. The next prime is 13888669. The reversal of 13888666 is 66688831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13888669) 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, 2611 + ... + 5881.

It is an arithmetic number, because the mean of its divisors is an integer number (1428228).

Almost surely, 2^13888666 is an apocalyptic number.

13888666 is a deficient number, since it is larger than the sum of its proper divisors (8962982).

13888666 is a wasteful number, since it uses less digits than its factorization.

13888666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477.

The product of its digits is 331776, while the sum is 46.

The square root of 13888666 is about 3726.7500586973. The cubic root of 13888666 is about 240.3736425321.

It can be divided in two parts, 138 and 88666, that added together give a square (88804 = 298²).

The spelling of 13888666 in words is "thirteen million, eight hundred eighty-eight thousand, six hundred sixty-six".