668013 has 8 divisors (see below), whose sum is σ = 912576. Its totient is φ = 434400.

The previous prime is 668009. The next prime is 668029. The reversal of 668013 is 310866.

668013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668013 - 2² = 668009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2593 + ... + 2838.

It is an arithmetic number, because the mean of its divisors is an integer number (114072).

2⁶⁶⁸⁰¹³ is an apocalyptic number.

It is an amenable number.

668013 is a deficient number, since it is larger than the sum of its proper divisors (244563).

668013 is a wasteful number, since it uses less digits than its factorization.

668013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 668013 is about 817.3206225222. The cubic root of 668013 is about 87.4168134563.

Adding to 668013 its reverse (310866), we get a palindrome (978879).

The spelling of 668013 in words is "six hundred sixty-eight thousand, thirteen".