13666822 has 16 divisors (see below), whose sum is σ = 22139712. Its totient is φ = 6289920.

The previous prime is 13666813. The next prime is 13666823. The reversal of 13666822 is 22866631.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13666823) 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, 14547 + ... + 15457.

It is an arithmetic number, because the mean of its divisors is an integer number (1383732).

Almost surely, 2^13666822 is an apocalyptic number.

13666822 is a deficient number, since it is larger than the sum of its proper divisors (8472890).

13666822 is a wasteful number, since it uses less digits than its factorization.

13666822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503.

The product of its digits is 20736, while the sum is 34.

The square root of 13666822 is about 3696.8665109793. The cubic root of 13666822 is about 239.0869358051.

The spelling of 13666822 in words is "thirteen million, six hundred sixty-six thousand, eight hundred twenty-two".