268663 has 4 divisors (see below), whose sum is σ = 280368. Its totient is φ = 256960.

The previous prime is 268661. The next prime is 268693. The reversal of 268663 is 366862.

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 268663 - 2¹ = 268661 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5818 + ... + 5863.

It is an arithmetic number, because the mean of its divisors is an integer number (70092).

2²⁶⁸⁶⁶³ is an apocalyptic number.

268663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

268663 is a deficient number, since it is larger than the sum of its proper divisors (11705).

268663 is a wasteful number, since it uses less digits than its factorization.

268663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11704.

The product of its digits is 10368, while the sum is 31.

The square root of 268663 is about 518.3271167902. The cubic root of 268663 is about 64.5261797057.

The spelling of 268663 in words is "two hundred sixty-eight thousand, six hundred sixty-three".