669537 has 12 divisors (see below), whose sum is σ = 1055184. Its totient is φ = 405720.

The previous prime is 669527. The next prime is 669551. The reversal of 669537 is 735966.

It is a happy number.

669537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 669537 - 2¹⁰ = 668513 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669537.

It is not an unprimeable number, because it can be changed into a prime (669527) 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, 3283 + ... + 3480.

It is an arithmetic number, because the mean of its divisors is an integer number (87932).

2⁶⁶⁹⁵³⁷ is an apocalyptic number.

It is an amenable number.

669537 is a deficient number, since it is larger than the sum of its proper divisors (385647).

669537 is a wasteful number, since it uses less digits than its factorization.

669537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780 (or 6777 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 669537 is about 818.2524060460. The cubic root of 669537 is about 87.4832403275.

The spelling of 669537 in words is "six hundred sixty-nine thousand, five hundred thirty-seven".