67663 has 4 divisors (see below), whose sum is σ = 68688. Its totient is φ = 66640.

The previous prime is 67651. The next prime is 67679. The reversal of 67663 is 36676.

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

It is a cyclic number.

It is not a de Polignac number, because 67663 - 2⁵ = 67631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406 + ... + 547.

It is an arithmetic number, because the mean of its divisors is an integer number (17172).

2⁶⁷⁶⁶³ is an apocalyptic number.

67663 is a deficient number, since it is larger than the sum of its proper divisors (1025).

67663 is an equidigital number, since it uses as much as digits as its factorization.

67663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024.

The product of its digits is 4536, while the sum is 28.

The square root of 67663 is about 260.1211256319. The cubic root of 67663 is about 40.7490119825.

The spelling of 67663 in words is "sixty-seven thousand, six hundred sixty-three".