669441 has 12 divisors (see below), whose sum is σ = 922992. Its totient is φ = 431568.

The previous prime is 669437. The next prime is 669451. The reversal of 669441 is 144966.

It is not a de Polignac number, because 669441 - 2² = 669437 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 669399 and 669408.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669441.

It is not an unprimeable number, because it can be changed into a prime (669401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4026 + ... + 4188.

It is an arithmetic number, because the mean of its divisors is an integer number (76916).

2⁶⁶⁹⁴⁴¹ is an apocalyptic number.

It is an amenable number.

669441 is a deficient number, since it is larger than the sum of its proper divisors (253551).

669441 is a wasteful number, since it uses less digits than its factorization.

669441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 203 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 669441 is about 818.1937423374. The cubic root of 669441 is about 87.4790589342.

The spelling of 669441 in words is "six hundred sixty-nine thousand, four hundred forty-one".