665214 has 16 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 201560.

The previous prime is 665213. The next prime is 665221. The reversal of 665214 is 412566.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665213) 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 7 ways as a sum of consecutive naturals, for example, 4974 + ... + 5105.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2⁶⁶⁵²¹⁴ is an apocalyptic number.

665214 is an abundant number, since it is smaller than the sum of its proper divisors (786306).

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

665214 is a wasteful number, since it uses less digits than its factorization.

665214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10095.

The product of its digits is 1440, while the sum is 24.

The square root of 665214 is about 815.6065227792. The cubic root of 665214 is about 87.2945492700.

It can be divided in two parts, 6652 and 14, that added together give a palindrome (6666).

The spelling of 665214 in words is "six hundred sixty-five thousand, two hundred fourteen".