666011117012 has 6 divisors (see below), whose sum is σ = 1165519454778. Its totient is φ = 333005558504.

The previous prime is 666011116997. The next prime is 666011117033. The reversal of 666011117012 is 210711110666.

It can be written as a sum of positive squares in only one way, i.e., 393123984016 + 272887132996 = 626996^2 + 522386^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 666011117012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83251389623 + ... + 83251389630.

It is an arithmetic number, because the mean of its divisors is an integer number (194253242463).

Almost surely, 2^666011117012 is an apocalyptic number.

It is an amenable number.

666011117012 is a deficient number, since it is larger than the sum of its proper divisors (499508337766).

666011117012 is a wasteful number, since it uses less digits than its factorization.

666011117012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166502779257 (or 166502779255 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

Adding to 666011117012 its reverse (210711110666), we get a palindrome (876722227678).

The spelling of 666011117012 in words is "six hundred sixty-six billion, eleven million, one hundred seventeen thousand, twelve".