669306 has 16 divisors (see below), whose sum is σ = 1460448. Its totient is φ = 202800.

The previous prime is 669301. The next prime is 669311. The reversal of 669306 is 603966.

It is an interprime number because it is at equal distance from previous prime (669301) and next prime (669311).

It is not an unprimeable number, because it can be changed into a prime (669301) by changing a digit.

669306 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 5005 + ... + 5136.

It is an arithmetic number, because the mean of its divisors is an integer number (91278).

2⁶⁶⁹³⁰⁶ is an apocalyptic number.

669306 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

669306 is an abundant number, since it is smaller than the sum of its proper divisors (791142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669306 is a wasteful number, since it uses less digits than its factorization.

669306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10157.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 669306 is about 818.1112393801. Note that the first 3 decimals coincide. The cubic root of 669306 is about 87.4731781736.

The spelling of 669306 in words is "six hundred sixty-nine thousand, three hundred six".