105665566556 has 12 divisors (see below), whose sum is σ = 201725172600. Its totient is φ = 48029802960.

The previous prime is 105665566547. The next prime is 105665566577. The reversal of 105665566556 is 655665566501.

It is a super-2 number, since 2×105665566556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1200745031 + ... + 1200745118.

It is an arithmetic number, because the mean of its divisors is an integer number (16810431050).

Almost surely, 2^105665566556 is an apocalyptic number.

It is an amenable number.

105665566556 is a deficient number, since it is larger than the sum of its proper divisors (96059606044).

105665566556 is a wasteful number, since it uses less digits than its factorization.

105665566556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401490164 (or 2401490162 counting only the distinct ones).

The product of its (nonzero) digits is 24300000, while the sum is 56.

Subtracting 105665566556 from its reverse (655665566501), we obtain a palindrome (549999999945).

It can be divided in two parts, 1056655 and 66556, that added together give a palindrome (1123211).

The spelling of 105665566556 in words is "one hundred five billion, six hundred sixty-five million, five hundred sixty-six thousand, five hundred fifty-six".