668674 has 8 divisors (see below), whose sum is σ = 1006848. Its totient is φ = 333060.

The previous prime is 668671. The next prime is 668677. The reversal of 668674 is 476866.

668674 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (668671) and next prime (668677).

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

It is not an unprimeable number, because it can be changed into a prime (668671) 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, 279 + ... + 1189.

It is an arithmetic number, because the mean of its divisors is an integer number (125856).

2⁶⁶⁸⁶⁷⁴ is an apocalyptic number.

668674 is a deficient number, since it is larger than the sum of its proper divisors (338174).

668674 is a wasteful number, since it uses less digits than its factorization.

668674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its digits is 48384, while the sum is 37.

The square root of 668674 is about 817.7248926136. The cubic root of 668674 is about 87.4456369800.

The spelling of 668674 in words is "six hundred sixty-eight thousand, six hundred seventy-four".