13966 has 4 divisors (see below), whose sum is σ = 20952. Its totient is φ = 6982.

The previous prime is 13963. The next prime is 13967. The reversal of 13966 is 66931.

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

It is a plaindrome in base 16.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 13966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3490 + ... + 3493.

It is an arithmetic number, because the mean of its divisors is an integer number (5238).

2¹³⁹⁶⁶ is an apocalyptic number.

13966 is a deficient number, since it is larger than the sum of its proper divisors (6986).

13966 is an equidigital number, since it uses as much as digits as its factorization.

13966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985.

The product of its digits is 972, while the sum is 25.

The square root of 13966 is about 118.1778321006. The cubic root of 13966 is about 24.0818961506.

It can be divided in two parts, 13 and 966, that added together give a palindrome (979).

The spelling of 13966 in words is "thirteen thousand, nine hundred sixty-six".