669608 has 8 divisors (see below), whose sum is σ = 1255530. Its totient is φ = 334800.

The previous prime is 669607. The next prime is 669611. The reversal of 669608 is 806966.

669608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 669124 + 484 = 818^2 + 22^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (669607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41843 + ... + 41858.

2⁶⁶⁹⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

669608 is a deficient number, since it is larger than the sum of its proper divisors (585922).

669608 is a wasteful number, since it uses less digits than its factorization.

669608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83707 (or 83703 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 669608 is about 818.2957900417. The cubic root of 669608 is about 87.4863325591.

The spelling of 669608 in words is "six hundred sixty-nine thousand, six hundred eight".