660608816 has 20 divisors (see below), whose sum is σ = 1462776912. Its totient is φ = 283118016.

The previous prime is 660608813. The next prime is 660608821. The reversal of 660608816 is 618806066.

It is not an unprimeable number, because it can be changed into a prime (660608813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2949035 + ... + 2949258.

Almost surely, 2^660608816 is an apocalyptic number.

It is an amenable number.

660608816 is an abundant number, since it is smaller than the sum of its proper divisors (802168096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660608816 is a wasteful number, since it uses less digits than its factorization.

660608816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5898308 (or 5898302 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 660608816 is about 25702.3114913815. The cubic root of 660608816 is about 870.9263994633.

The spelling of 660608816 in words is "six hundred sixty million, six hundred eight thousand, eight hundred sixteen".