668263 has 4 divisors (see below), whose sum is σ = 683848. Its totient is φ = 652680.

The previous prime is 668243. The next prime is 668273. The reversal of 668263 is 362866.

668263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 668263 - 2¹³ = 660071 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 (668203) 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, 7728 + ... + 7813.

It is an arithmetic number, because the mean of its divisors is an integer number (170962).

2⁶⁶⁸²⁶³ is an apocalyptic number.

668263 is a deficient number, since it is larger than the sum of its proper divisors (15585).

668263 is a wasteful number, since it uses less digits than its factorization.

668263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15584.

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

The square root of 668263 is about 817.4735469726. The cubic root of 668263 is about 87.4277171751.

The spelling of 668263 in words is "six hundred sixty-eight thousand, two hundred sixty-three".