13966663 has 4 divisors (see below), whose sum is σ = 13975048. Its totient is φ = 13958280.

The previous prime is 13966651. The next prime is 13966669. The reversal of 13966663 is 36666931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13966663 - 2²¹ = 11869511 is a prime.

It is a super-3 number, since 3×13966663³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13966669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753 + ... + 5338.

It is an arithmetic number, because the mean of its divisors is an integer number (3493762).

Almost surely, 2^13966663 is an apocalyptic number.

13966663 is a deficient number, since it is larger than the sum of its proper divisors (8385).

13966663 is an equidigital number, since it uses as much as digits as its factorization.

13966663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8384.

The product of its digits is 104976, while the sum is 40.

The square root of 13966663 is about 3737.1998876164. The cubic root of 13966663 is about 240.8227721995.

The spelling of 13966663 in words is "thirteen million, nine hundred sixty-six thousand, six hundred sixty-three".