666600116 has 72 divisors (see below), whose sum is σ = 1467196416. Its totient is φ = 262664640.

The previous prime is 666600091. The next prime is 666600149. The reversal of 666600116 is 611006666.

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, 1097885 + ... + 1098491.

It is an arithmetic number, because the mean of its divisors is an integer number (20377728).

Almost surely, 2^666600116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666600116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733598208).

666600116 is an abundant number, since it is smaller than the sum of its proper divisors (800596300).

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

666600116 is a wasteful number, since it uses less digits than its factorization.

666600116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 666600116 is about 25818.6001944335. The cubic root of 666600116 is about 873.5513950878.

The spelling of 666600116 in words is "six hundred sixty-six million, six hundred thousand, one hundred sixteen".