505766667505 has 16 divisors (see below), whose sum is σ = 669533817600. Its totient is φ = 363697375360.

The previous prime is 505766667503. The next prime is 505766667509.

505766667505 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 505766667505 - 2¹ = 505766667503 is a prime.

It is a super-2 number, since 2×505766667505² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 505766667505.

It is not an unprimeable number, because it can be changed into a prime (505766667503) 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 15 ways as a sum of consecutive naturals, for example, 51656665 + ... + 51666454.

It is an arithmetic number, because the mean of its divisors is an integer number (41845863600).

Almost surely, 2^505766667505 is an apocalyptic number.

505766667505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

505766667505 is a deficient number, since it is larger than the sum of its proper divisors (163767150095).

505766667505 is a wasteful number, since it uses less digits than its factorization.

505766667505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103323224.

The product of its (nonzero) digits is 39690000, while the sum is 58.

The spelling of 505766667505 in words is "five hundred five billion, seven hundred sixty-six million, six hundred sixty-seven thousand, five hundred five".