668500 has 48 divisors (see below), whose sum is σ = 1677312. Its totient is φ = 228000.

The previous prime is 668471. The next prime is 668509. The reversal of 668500 is 5866.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668509) 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, 3405 + ... + 3595.

It is an arithmetic number, because the mean of its divisors is an integer number (34944).

2⁶⁶⁸⁵⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838656).

668500 is an abundant number, since it is smaller than the sum of its proper divisors (1008812).

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

668500 is a wasteful number, since it uses less digits than its factorization.

668500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 668500 is about 817.6184929415. The cubic root of 668500 is about 87.4380513898.

The spelling of 668500 in words is "six hundred sixty-eight thousand, five hundred".