669039 has 8 divisors (see below), whose sum is σ = 1019520. Its totient is φ = 382296.

The previous prime is 669029. The next prime is 669049. The reversal of 669039 is 930966.

It is an interprime number because it is at equal distance from previous prime (669029) and next prime (669049).

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

It is not a de Polignac number, because 669039 - 2⁴ = 669023 is a prime.

It is a super-2 number, since 2×669039² = 895226367042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15909 + ... + 15950.

It is an arithmetic number, because the mean of its divisors is an integer number (127440).

2⁶⁶⁹⁰³⁹ is an apocalyptic number.

669039 is a deficient number, since it is larger than the sum of its proper divisors (350481).

669039 is a wasteful number, since it uses less digits than its factorization.

669039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31869.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 669039 is about 817.9480423597. The cubic root of 669039 is about 87.4615450068.

The spelling of 669039 in words is "six hundred sixty-nine thousand, thirty-nine".