669911606 has 48 divisors (see below), whose sum is σ = 1264896000. Its totient is φ = 260473824.

The previous prime is 669911597. The next prime is 669911611. The reversal of 669911606 is 606119966.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137195 + ... + 141993.

It is an arithmetic number, because the mean of its divisors is an integer number (26352000).

Almost surely, 2^669911606 is an apocalyptic number.

669911606 is a deficient number, since it is larger than the sum of its proper divisors (594984394).

669911606 is a wasteful number, since it uses less digits than its factorization.

669911606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893 (or 4880 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 669911606 is about 25882.6506756939. The cubic root of 669911606 is about 874.9955291200.

The spelling of 669911606 in words is "six hundred sixty-nine million, nine hundred eleven thousand, six hundred six".