505011666066 has 64 divisors (see below), whose sum is σ = 1023674319360. Its totient is φ = 166079713280.

The previous prime is 505011666043. The next prime is 505011666067. The reversal of 505011666066 is 660666110505.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505011666067) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 118573045 + ... + 118577303.

It is an arithmetic number, because the mean of its divisors is an integer number (15994911240).

Almost surely, 2^505011666066 is an apocalyptic number.

505011666066 is an abundant number, since it is smaller than the sum of its proper divisors (518662653294).

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

505011666066 is a wasteful number, since it uses less digits than its factorization.

505011666066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 505011666066 in words is "five hundred five billion, eleven million, six hundred sixty-six thousand, sixty-six".