669299 has 4 divisors (see below), whose sum is σ = 675336. Its totient is φ = 663264.

The previous prime is 669289. The next prime is 669301. The reversal of 669299 is 992966.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 669299 - 2⁴ = 669283 is a prime.

It is a super-2 number, since 2×669299² = 895922302802, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669289) 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 3 ways as a sum of consecutive naturals, for example, 2849 + ... + 3074.

It is an arithmetic number, because the mean of its divisors is an integer number (168834).

2⁶⁶⁹²⁹⁹ is an apocalyptic number.

669299 is a deficient number, since it is larger than the sum of its proper divisors (6037).

669299 is a wasteful number, since it uses less digits than its factorization.

669299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6036.

The product of its digits is 52488, while the sum is 41.

The square root of 669299 is about 818.1069612221. The cubic root of 669299 is about 87.4728732237.

The spelling of 669299 in words is "six hundred sixty-nine thousand, two hundred ninety-nine".