660538116 has 72 divisors (see below), whose sum is σ = 2008668480. Its totient is φ = 178790976.

The previous prime is 660538079. The next prime is 660538117. The reversal of 660538116 is 611835066.

It is a happy number.

660538116 is a `hidden beast` number, since 6 + 6 + 0 + 538 + 116 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (660538117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64191 + ... + 73766.

Almost surely, 2^660538116 is an apocalyptic number.

It is an amenable number.

660538116 is an abundant number, since it is smaller than the sum of its proper divisors (1348130364).

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

660538116 is a wasteful number, since it uses less digits than its factorization.

660538116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137993 (or 137988 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 660538116 is about 25700.9360919014. The cubic root of 660538116 is about 870.8953287844.

The spelling of 660538116 in words is "six hundred sixty million, five hundred thirty-eight thousand, one hundred sixteen".