6660198616 has 16 divisors (see below), whose sum is σ = 12825383040. Its totient is φ = 3240096480.

The previous prime is 6660198599. The next prime is 6660198617. The reversal of 6660198616 is 6168910666.

It is a self number, because there is not a number n which added to its sum of digits gives 6660198616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660198617) 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, 11250040 + ... + 11250631.

It is an arithmetic number, because the mean of its divisors is an integer number (801586440).

Almost surely, 2^6660198616 is an apocalyptic number.

It is an amenable number.

6660198616 is a deficient number, since it is larger than the sum of its proper divisors (6165184424).

6660198616 is a wasteful number, since it uses less digits than its factorization.

6660198616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22500714 (or 22500710 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 6660198616 is about 81610.0399215685. The cubic root of 6660198616 is about 1881.4631939401.

The spelling of 6660198616 in words is "six billion, six hundred sixty million, one hundred ninety-eight thousand, six hundred sixteen".