669741 has 4 divisors (see below), whose sum is σ = 892992. Its totient is φ = 446492.

The previous prime is 669733. The next prime is 669763. The reversal of 669741 is 147966.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 669741 - 2³ = 669733 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669701) 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, 111621 + ... + 111626.

It is an arithmetic number, because the mean of its divisors is an integer number (223248).

2⁶⁶⁹⁷⁴¹ is an apocalyptic number.

It is an amenable number.

669741 is a deficient number, since it is larger than the sum of its proper divisors (223251).

669741 is a wasteful number, since it uses less digits than its factorization.

669741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223250.

The product of its digits is 9072, while the sum is 33.

The square root of 669741 is about 818.3770524642. The cubic root of 669741 is about 87.4921244612.

The spelling of 669741 in words is "six hundred sixty-nine thousand, seven hundred forty-one".