666100608 has 128 divisors (see below), whose sum is σ = 1882414080. Its totient is φ = 208226304.

The previous prime is 666100601. The next prime is 666100639. The reversal of 666100608 is 806001666.

666100608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666100601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467385 + ... + 468807.

It is an arithmetic number, because the mean of its divisors is an integer number (14706360).

Almost surely, 2^666100608 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 666100608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941207040).

666100608 is an abundant number, since it is smaller than the sum of its proper divisors (1216313472).

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

666100608 is a wasteful number, since it uses less digits than its factorization.

666100608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1504 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 666100608 is about 25808.9249679253. The cubic root of 666100608 is about 873.3331458280. Note that the first 3 decimals are identical.

The spelling of 666100608 in words is "six hundred sixty-six million, one hundred thousand, six hundred eight".