669997733 has 2 divisors, whose sum is σ = 669997734. Its totient is φ = 669997732.

The previous prime is 669997711. The next prime is 669997753. The reversal of 669997733 is 337799966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654489889 + 15507844 = 25583^2 + 3938^2 .

It is a cyclic number.

It is not a de Polignac number, because 669997733 - 2⁸ = 669997477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669997753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334998866 + 334998867.

It is an arithmetic number, because the mean of its divisors is an integer number (334998867).

Almost surely, 2^669997733 is an apocalyptic number.

It is an amenable number.

669997733 is a deficient number, since it is larger than the sum of its proper divisors (1).

669997733 is an equidigital number, since it uses as much as digits as its factorization.

669997733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11573604, while the sum is 59.

The square root of 669997733 is about 25884.3144201271. The cubic root of 669997733 is about 875.0330253657.

The spelling of 669997733 in words is "six hundred sixty-nine million, nine hundred ninety-seven thousand, seven hundred thirty-three".