662868 has 18 divisors (see below), whose sum is σ = 1675674. Its totient is φ = 220944.

The previous prime is 662867. The next prime is 662897. The reversal of 662868 is 868266.

It can be written as a sum of positive squares in only one way, i.e., 501264 + 161604 = 708^2 + 402^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 18413 = 662868 / (6 + 6 + 2 + 8 + 6 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9171 + ... + 9242.

It is an arithmetic number, because the mean of its divisors is an integer number (93093).

2⁶⁶²⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

662868 is an abundant number, since it is smaller than the sum of its proper divisors (1012806).

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

662868 is a wasteful number, since it uses less digits than its factorization.

662868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18423 (or 18418 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 662868 is about 814.1670590241. The cubic root of 662868 is about 87.1918082813.

The spelling of 662868 in words is "six hundred sixty-two thousand, eight hundred sixty-eight".