666322 has 4 divisors (see below), whose sum is σ = 999486. Its totient is φ = 333160.

The previous prime is 666301. The next prime is 666329. The reversal of 666322 is 223666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 223666 = 2 ⋅111833.

It can be written as a sum of positive squares in only one way, i.e., 505521 + 160801 = 711^2 + 401^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (666329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166579 + ... + 166582.

2⁶⁶⁶³²² is an apocalyptic number.

666322 is a deficient number, since it is larger than the sum of its proper divisors (333164).

666322 is a wasteful number, since it uses less digits than its factorization.

666322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333163.

The product of its digits is 2592, while the sum is 25.

The square root of 666322 is about 816.2854892744. The cubic root of 666322 is about 87.3429891751.

Adding to 666322 its reverse (223666), we get a palindrome (889988).

The spelling of 666322 in words is "six hundred sixty-six thousand, three hundred twenty-two".