668316 has 48 divisors (see below), whose sum is σ = 1749888. Its totient is φ = 196800.

The previous prime is 668303. The next prime is 668347. The reversal of 668316 is 613866.

Its product of digits (5184) is a multiple of the sum of its prime factors (162).

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

668316 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8011 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (36456).

2⁶⁶⁸³¹⁶ is an apocalyptic number.

668316 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874944).

668316 is an abundant number, since it is smaller than the sum of its proper divisors (1081572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668316 is a wasteful number, since it uses less digits than its factorization.

668316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 160 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 668316 is about 817.5059632810. The cubic root of 668316 is about 87.4300284141.

The spelling of 668316 in words is "six hundred sixty-eight thousand, three hundred sixteen".