669553 has 8 divisors (see below), whose sum is σ = 715968. Its totient is φ = 624624.

The previous prime is 669551. The next prime is 669577. The reversal of 669553 is 355966.

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

It is a cyclic number.

It is not a de Polignac number, because 669553 - 2¹ = 669551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669551) 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 7 ways as a sum of consecutive naturals, for example, 651 + ... + 1327.

It is an arithmetic number, because the mean of its divisors is an integer number (89496).

2⁶⁶⁹⁵⁵³ is an apocalyptic number.

It is an amenable number.

669553 is a deficient number, since it is larger than the sum of its proper divisors (46415).

669553 is a wasteful number, since it uses less digits than its factorization.

669553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its digits is 24300, while the sum is 34.

The square root of 669553 is about 818.2621829218. The cubic root of 669553 is about 87.4839371875.

The spelling of 669553 in words is "six hundred sixty-nine thousand, five hundred fifty-three".