505561066605 has 48 divisors (see below), whose sum is σ = 1001546582400. Its totient is φ = 231101126784.

The previous prime is 505561066603. The next prime is 505561066609. The reversal of 505561066605 is 506660165505.

It is not a de Polignac number, because 505561066605 - 2¹ = 505561066603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505561066603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8375071 + ... + 8435219.

It is an arithmetic number, because the mean of its divisors is an integer number (20865553800).

Almost surely, 2^505561066605 is an apocalyptic number.

It is an amenable number.

505561066605 is a deficient number, since it is larger than the sum of its proper divisors (495985515795).

505561066605 is a wasteful number, since it uses less digits than its factorization.

505561066605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86850 (or 86847 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

It can be divided in two parts, 5055610 and 66605, that added together give a palindrome (5122215).

The spelling of 505561066605 in words is "five hundred five billion, five hundred sixty-one million, sixty-six thousand, six hundred five".