669869968966 has 48 divisors (see below), whose sum is σ = 1132727515920. Its totient is φ = 296709459200.

The previous prime is 669869968931. The next prime is 669869968969.

669869968966 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669869968969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8463765 + ... + 8542543.

It is an arithmetic number, because the mean of its divisors is an integer number (23598489915).

Almost surely, 2^669869968966 is an apocalyptic number.

669869968966 is a deficient number, since it is larger than the sum of its proper divisors (462857546954).

669869968966 is a wasteful number, since it uses less digits than its factorization.

669869968966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79701 (or 79690 counting only the distinct ones).

The product of its digits is 19591041024, while the sum is 88.

The spelling of 669869968966 in words is "six hundred sixty-nine billion, eight hundred sixty-nine million, nine hundred sixty-eight thousand, nine hundred sixty-six".