665326 has 8 divisors (see below), whose sum is σ = 1007640. Its totient is φ = 329448.

The previous prime is 665311. The next prime is 665351. The reversal of 665326 is 623566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 6³ + 6⁴ + 3¹² + 5 + 2¹⁷ + 6⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 665294 and 665303.

It is a congruent number.

It is an unprimeable number.

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, 1341 + ... + 1768.

It is an arithmetic number, because the mean of its divisors is an integer number (125955).

2⁶⁶⁵³²⁶ is an apocalyptic number.

665326 is a deficient number, since it is larger than the sum of its proper divisors (342314).

665326 is a wasteful number, since it uses less digits than its factorization.

665326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218.

The product of its digits is 6480, while the sum is 28.

The square root of 665326 is about 815.6751804487. The cubic root of 665326 is about 87.2994481652.

The spelling of 665326 in words is "six hundred sixty-five thousand, three hundred twenty-six".