669266 has 8 divisors (see below), whose sum is σ = 1081164. Its totient is φ = 308880.

The previous prime is 669247. The next prime is 669271. The reversal of 669266 is 662966.

669266 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 2 ways, for example, as 664225 + 5041 = 815^2 + 71^2 .

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

It is an unprimeable number.

669266 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12845 + ... + 12896.

2⁶⁶⁹²⁶⁶ is an apocalyptic number.

669266 is a deficient number, since it is larger than the sum of its proper divisors (411898).

669266 is a wasteful number, since it uses less digits than its factorization.

669266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25756.

The product of its digits is 23328, while the sum is 35.

The square root of 669266 is about 818.0867924615. The cubic root of 669266 is about 87.4714355741.

The spelling of 669266 in words is "six hundred sixty-nine thousand, two hundred sixty-six".