669757323269 has 4 divisors (see below), whose sum is σ = 678932081196. Its totient is φ = 660582565344.

The previous prime is 669757323241. The next prime is 669757323271. The reversal of 669757323269 is 962323757966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172090566244 + 497666757025 = 414838^2 + 705455^2 .

It is a cyclic number.

It is not a de Polignac number, because 669757323269 - 2¹² = 669757319173 is a prime.

It is a super-2 number, since 2×669757323269² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669757320269) 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 in 3 ways as a sum of consecutive naturals, for example, 4587378854 + ... + 4587378999.

It is an arithmetic number, because the mean of its divisors is an integer number (169733020299).

Almost surely, 2^669757323269 is an apocalyptic number.

It is an amenable number.

669757323269 is a deficient number, since it is larger than the sum of its proper divisors (9174757927).

669757323269 is an equidigital number, since it uses as much as digits as its factorization.

669757323269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174757926.

The product of its digits is 154314720, while the sum is 65.

The spelling of 669757323269 in words is "six hundred sixty-nine billion, seven hundred fifty-seven million, three hundred twenty-three thousand, two hundred sixty-nine".