668376 has 24 divisors (see below), whose sum is σ = 1810380. Its totient is φ = 222768.

The previous prime is 668347. The next prime is 668407. The reversal of 668376 is 673866.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 668376.

It is a congruent number.

It is an unprimeable number.

668376 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 5 ways as a sum of consecutive naturals, for example, 4570 + ... + 4713.

2⁶⁶⁸³⁷⁶ is an apocalyptic number.

It is an amenable number.

668376 is an abundant number, since it is smaller than the sum of its proper divisors (1142004).

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

668376 is a wasteful number, since it uses less digits than its factorization.

668376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9295 (or 9288 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 668376 is about 817.5426594374. The cubic root of 668376 is about 87.4326447636.

The spelling of 668376 in words is "six hundred sixty-eight thousand, three hundred seventy-six".