669342 has 16 divisors (see below), whose sum is σ = 1346832. Its totient is φ = 221760.

The previous prime is 669329. The next prime is 669359. The reversal of 669342 is 243966.

It is a d-powerful number, because it can be written as 6 + 6 + 3¹² + 9⁴ + 4⁴ + 2¹⁷ .

It is a congruent number.

It is an unprimeable 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, 1488 + ... + 1884.

It is an arithmetic number, because the mean of its divisors is an integer number (84177).

2⁶⁶⁹³⁴² is an apocalyptic number.

669342 is an abundant number, since it is smaller than the sum of its proper divisors (677490).

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

669342 is a wasteful number, since it uses less digits than its factorization.

669342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683.

The product of its digits is 7776, while the sum is 30.

The square root of 669342 is about 818.1332409822. The cubic root of 669342 is about 87.4747464537.

The spelling of 669342 in words is "six hundred sixty-nine thousand, three hundred forty-two".