665233 has 2 divisors, whose sum is σ = 665234. Its totient is φ = 665232.

The previous prime is 665221. The next prime is 665239. The reversal of 665233 is 332566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603729 + 61504 = 777^2 + 248^2 .

It is a cyclic number.

It is not a de Polignac number, because 665233 - 2⁵ = 665201 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 6⁴ + 2¹⁷ + 5³ + 3 + 3¹² .

665233 is a lucky number.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 665198 and 665207.

It is not a weakly prime, because it can be changed into another prime (665239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332616 + 332617.

It is an arithmetic number, because the mean of its divisors is an integer number (332617).

2⁶⁶⁵²³³ is an apocalyptic number.

It is an amenable number.

665233 is a deficient number, since it is larger than the sum of its proper divisors (1).

665233 is an equidigital number, since it uses as much as digits as its factorization.

665233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 25.

The square root of 665233 is about 815.6181704695. The cubic root of 665233 is about 87.2953803713.

Adding to 665233 its reverse (332566), we get a palindrome (997799).

It can be divided in two parts, 665 and 233, that added together give a palindrome (898).

The spelling of 665233 in words is "six hundred sixty-five thousand, two hundred thirty-three".