13665622 has 4 divisors (see below), whose sum is σ = 20498436. Its totient is φ = 6832810.

The previous prime is 13665607. The next prime is 13665623. The reversal of 13665622 is 22656631.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13665623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3416404 + ... + 3416407.

It is an arithmetic number, because the mean of its divisors is an integer number (5124609).

Almost surely, 2^13665622 is an apocalyptic number.

13665622 is a deficient number, since it is larger than the sum of its proper divisors (6832814).

13665622 is an equidigital number, since it uses as much as digits as its factorization.

13665622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832813.

The product of its digits is 12960, while the sum is 31.

The square root of 13665622 is about 3696.7042078046. The cubic root of 13665622 is about 239.0799380134.

The spelling of 13665622 in words is "thirteen million, six hundred sixty-five thousand, six hundred twenty-two".