2166616056250 has 48 divisors (see below), whose sum is σ = 4068489834360. Its totient is φ = 865292800000.

The previous prime is 2166616056217. The next prime is 2166616056251. The reversal of 2166616056250 is 526506166612.

It can be written as a sum of positive squares in 12 ways, for example, as 264277218241 + 1902338838009 = 514079^2 + 1379253^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2166616056250.

It is not an unprimeable number, because it can be changed into a prime (2166616056251) 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, 3735846 + ... + 4276654.

Almost surely, 2^{2166616056250} is an apocalyptic number.

2166616056250 is a deficient number, since it is larger than the sum of its proper divisors (1901873778110).

2166616056250 is an frugal number, since it uses more digits than its factorization.

2166616056250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541477 (or 541457 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 2166616056250 in words is "two trillion, one hundred sixty-six billion, six hundred sixteen million, fifty-six thousand, two hundred fifty".