166061805200 has 60 divisors (see below), whose sum is σ = 402623808180. Its totient is φ = 65815303680.

The previous prime is 166061805199. The next prime is 166061805257. The reversal of 166061805200 is 2508160661.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 13890036736 + 152171768464 = 117856^2 + 390092^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1860779 + ... + 1947978.

It is an arithmetic number, because the mean of its divisors is an integer number (6710396803).

Almost surely, 2^166061805200 is an apocalyptic number.

166061805200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166061805200 is an abundant number, since it is smaller than the sum of its proper divisors (236562002980).

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

166061805200 is a wasteful number, since it uses less digits than its factorization.

166061805200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808884 (or 3808873 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

Adding to 166061805200 its reverse (2508160661), we get a palindrome (168569965861).

The spelling of 166061805200 in words is "one hundred sixty-six billion, sixty-one million, eight hundred five thousand, two hundred".