668113 has 4 divisors (see below), whose sum is σ = 669760. Its totient is φ = 666468.

The previous prime is 668111. The next prime is 668141. The reversal of 668113 is 311866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, 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 668113 - 2¹ = 668111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668111) 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, 268 + ... + 1186.

It is an arithmetic number, because the mean of its divisors is an integer number (167440).

2⁶⁶⁸¹¹³ is an apocalyptic number.

It is an amenable number.

668113 is a deficient number, since it is larger than the sum of its proper divisors (1647).

668113 is an equidigital number, since it uses as much as digits as its factorization.

668113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its digits is 864, while the sum is 25.

The square root of 668113 is about 817.3817957356. The cubic root of 668113 is about 87.4211752702.

Adding to 668113 its reverse (311866), we get a palindrome (979979).

The spelling of 668113 in words is "six hundred sixty-eight thousand, one hundred thirteen".