166105556116 has 12 divisors (see below), whose sum is σ = 290776472980. Its totient is φ = 83026563840.

The previous prime is 166105556093. The next prime is 166105556117. The reversal of 166105556116 is 611655501661.

It can be written as a sum of positive squares in 2 ways, for example, as 50267433616 + 115838122500 = 224204^2 + 340350^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166105556117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6539295 + ... + 6564646.

Almost surely, 2^166105556116 is an apocalyptic number.

It is an amenable number.

166105556116 is a deficient number, since it is larger than the sum of its proper divisors (124670916864).

166105556116 is a wasteful number, since it uses less digits than its factorization.

166105556116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13107114 (or 13107112 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 43.

It can be divided in two parts, 1661055 and 56116, that added together give a palindrome (1717171).

The spelling of 166105556116 in words is "one hundred sixty-six billion, one hundred five million, five hundred fifty-six thousand, one hundred sixteen".