669369 has 16 divisors (see below), whose sum is σ = 950400. Its totient is φ = 418176.

The previous prime is 669359. The next prime is 669371. The reversal of 669369 is 963966.

It is not a de Polignac number, because 669369 - 2⁷ = 669241 is a prime.

It is a super-2 number, since 2×669369² = 896109716322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669329) 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 15 ways as a sum of consecutive naturals, for example, 6087 + ... + 6195.

It is an arithmetic number, because the mean of its divisors is an integer number (59400).

2⁶⁶⁹³⁶⁹ is an apocalyptic number.

669369 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

669369 is a deficient number, since it is larger than the sum of its proper divisors (281031).

669369 is a wasteful number, since it uses less digits than its factorization.

669369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224.

The product of its digits is 52488, while the sum is 39.

The square root of 669369 is about 818.1497417955. The cubic root of 669369 is about 87.4759226269.

The spelling of 669369 in words is "six hundred sixty-nine thousand, three hundred sixty-nine".