669253 has 4 divisors (see below), whose sum is σ = 720748. Its totient is φ = 617760.

The previous prime is 669247. The next prime is 669271. The reversal of 669253 is 352966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124609 + 544644 = 353^2 + 738^2 .

It is not a de Polignac number, because 669253 - 2⁹ = 668741 is a prime.

It is a d-powerful number, because it can be written as 6 + 6⁵ + 2¹⁹ + 9 + 5⁷ + 3¹⁰ .

It is a Duffinian number.

669253 is a lucky number.

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 3 ways as a sum of consecutive naturals, for example, 25728 + ... + 25753.

It is an arithmetic number, because the mean of its divisors is an integer number (180187).

2⁶⁶⁹²⁵³ is an apocalyptic number.

It is an amenable number.

669253 is a deficient number, since it is larger than the sum of its proper divisors (51495).

669253 is a wasteful number, since it uses less digits than its factorization.

669253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51494.

The product of its digits is 9720, while the sum is 31.

The square root of 669253 is about 818.0788470557. The cubic root of 669253 is about 87.4708692143.

The spelling of 669253 in words is "six hundred sixty-nine thousand, two hundred fifty-three".