668514 has 32 divisors (see below), whose sum is σ = 1668096. Its totient is φ = 173520.

The previous prime is 668513. The next prime is 668527. The reversal of 668514 is 415866.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (668513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262 + ... + 1185.

It is an arithmetic number, because the mean of its divisors is an integer number (52128).

2⁶⁶⁸⁵¹⁴ is an apocalyptic number.

668514 is an abundant number, since it is smaller than the sum of its proper divisors (999582).

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

668514 is a wasteful number, since it uses less digits than its factorization.

668514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470.

The product of its digits is 5760, while the sum is 30.

The square root of 668514 is about 817.6270543469. The cubic root of 668514 is about 87.4386617733.

The spelling of 668514 in words is "six hundred sixty-eight thousand, five hundred fourteen".