666120100600 has 96 divisors (see below), whose sum is σ = 1558522458000. Its totient is φ = 264767754240.

The previous prime is 666120100577. The next prime is 666120100601. The reversal of 666120100600 is 6001021666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666120100601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23939496 + ... + 23967304.

Almost surely, 2^666120100600 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 666120100600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779261229000).

666120100600 is an abundant number, since it is smaller than the sum of its proper divisors (892402357400).

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

666120100600 is a wasteful number, since it uses less digits than its factorization.

666120100600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28577 (or 28568 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 666120100600 in words is "six hundred sixty-six billion, one hundred twenty million, one hundred thousand, six hundred".