668602 has 8 divisors (see below), whose sum is σ = 1094112. Its totient is φ = 303900.

The previous prime is 668599. The next prime is 668609. The reversal of 668602 is 206866.

It is a happy number.

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 (668609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15174 + ... + 15217.

It is an arithmetic number, because the mean of its divisors is an integer number (136764).

2⁶⁶⁸⁶⁰² is an apocalyptic number.

668602 is a deficient number, since it is larger than the sum of its proper divisors (425510).

668602 is a wasteful number, since it uses less digits than its factorization.

668602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30404.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 668602 is about 817.6808668423. The cubic root of 668602 is about 87.4424982747.

It can be divided in two parts, 66 and 8602, that added together give a palindrome (8668).

The spelling of 668602 in words is "six hundred sixty-eight thousand, six hundred two".