669611 has 2 divisors, whose sum is σ = 669612. Its totient is φ = 669610.

The previous prime is 669607. The next prime is 669637. The reversal of 669611 is 116966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669611 - 2² = 669607 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (669661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334805 + 334806.

It is an arithmetic number, because the mean of its divisors is an integer number (334806).

2⁶⁶⁹⁶¹¹ is an apocalyptic number.

669611 is a deficient number, since it is larger than the sum of its proper divisors (1).

669611 is an equidigital number, since it uses as much as digits as its factorization.

669611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The square root of 669611 is about 818.2976231177. The cubic root of 669611 is about 87.4864632120.

The spelling of 669611 in words is "six hundred sixty-nine thousand, six hundred eleven".