668614 has 8 divisors (see below), whose sum is σ = 1009008. Its totient is φ = 332280.

The previous prime is 668611. The next prime is 668617. The reversal of 668614 is 416866.

668614 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (668611) and next prime (668617).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668611) 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, 562 + ... + 1285.

It is an arithmetic number, because the mean of its divisors is an integer number (126126).

2⁶⁶⁸⁶¹⁴ is an apocalyptic number.

668614 is a deficient number, since it is larger than the sum of its proper divisors (340394).

668614 is a wasteful number, since it uses less digits than its factorization.

668614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030.

The product of its digits is 6912, while the sum is 31.

The square root of 668614 is about 817.6882046355. The cubic root of 668614 is about 87.4430214079.

The spelling of 668614 in words is "six hundred sixty-eight thousand, six hundred fourteen".