669242752405168 has 40 divisors (see below), whose sum is σ = 1303543817070336. Its totient is φ = 332844609292800.

The previous prime is 669242752405163. The next prime is 669242752405169. The reversal of 669242752405168 is 861504257242966.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (669242752405163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32855980 + ... + 49173172.

Almost surely, 2^{669242752405168} is an apocalyptic number.

It is an amenable number.

669242752405168 is a deficient number, since it is larger than the sum of its proper divisors (634301064665168).

669242752405168 is a wasteful number, since it uses less digits than its factorization.

669242752405168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16330813 (or 16330807 counting only the distinct ones).

The product of its (nonzero) digits is 348364800, while the sum is 67.

The spelling of 669242752405168 in words is "six hundred sixty-nine trillion, two hundred forty-two billion, seven hundred fifty-two million, four hundred five thousand, one hundred sixty-eight".