666169732200 has 768 divisors, whose sum is σ = 2560978944000. Its totient is φ = 139909017600.

The previous prime is 666169732199. The next prime is 666169732213. The reversal of 666169732200 is 2237961666.

It is a super-2 number, since 2×666169732200² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 666169732200.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 446194654 + ... + 446196146.

It is an arithmetic number, because the mean of its divisors is an integer number (3334608000).

Almost surely, 2^666169732200 is an apocalyptic number.

666169732200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666169732200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280489472000).

666169732200 is an abundant number, since it is smaller than the sum of its proper divisors (1894809211800).

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

666169732200 is a wasteful number, since it uses less digits than its factorization.

666169732200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722 (or 1713 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 666169732200 in words is "six hundred sixty-six billion, one hundred sixty-nine million, seven hundred thirty-two thousand, two hundred".