669285 has 24 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 351072.

The previous prime is 669283. The next prime is 669287. The reversal of 669285 is 582966.

669285 = T₅₄ + T₅₅ + ... + T₁₆₀.

669285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (669283) and next prime (669287).

It is not a de Polignac number, because 669285 - 2¹ = 669283 is a prime.

It is a super-2 number, since 2×669285² = 895884822450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4746 + ... + 4884.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2⁶⁶⁹²⁸⁵ is an apocalyptic number.

It is an amenable number.

669285 is a deficient number, since it is larger than the sum of its proper divisors (510075).

669285 is a wasteful number, since it uses less digits than its factorization.

669285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 254 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 669285 is about 818.0984048389. The cubic root of 669285 is about 87.4722633175.

The spelling of 669285 in words is "six hundred sixty-nine thousand, two hundred eighty-five".