669607 has 2 divisors, whose sum is σ = 669608. Its totient is φ = 669606.

The previous prime is 669577. The next prime is 669611. The reversal of 669607 is 706966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669607 - 2⁷ = 669479 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669637) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334803 + 334804.

It is an arithmetic number, because the mean of its divisors is an integer number (334804).

2⁶⁶⁹⁶⁰⁷ is an apocalyptic number.

669607 is a deficient number, since it is larger than the sum of its proper divisors (1).

669607 is an equidigital number, since it uses as much as digits as its factorization.

669607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 669607 is about 818.2951790155. The cubic root of 669607 is about 87.4862890081.

The spelling of 669607 in words is "six hundred sixty-nine thousand, six hundred seven".