664610844208 has 20 divisors (see below), whose sum is σ = 1287707034600. Its totient is φ = 332299351424.

The previous prime is 664610844167. The next prime is 664610844211. The reversal of 664610844208 is 802448016466.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600468 + ... + 1299916.

It is an arithmetic number, because the mean of its divisors is an integer number (64385351730).

Almost surely, 2^664610844208 is an apocalyptic number.

It is an amenable number.

664610844208 is a deficient number, since it is larger than the sum of its proper divisors (623096190392).

664610844208 is a wasteful number, since it uses less digits than its factorization.

664610844208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758844 (or 758838 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 49.

The spelling of 664610844208 in words is "six hundred sixty-four billion, six hundred ten million, eight hundred forty-four thousand, two hundred eight".