505165611667 has 4 divisors (see below), whose sum is σ = 505266670000. Its totient is φ = 505064553336.

The previous prime is 505165611593. The next prime is 505165611719. The reversal of 505165611667 is 766116561505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766116561505 = 5 ⋅153223312301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505165611667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505165611667.

It is not an unprimeable number, because it can be changed into a prime (505165611367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50521668 + ... + 50531665.

It is an arithmetic number, because the mean of its divisors is an integer number (126316667500).

Almost surely, 2^505165611667 is an apocalyptic number.

505165611667 is a deficient number, since it is larger than the sum of its proper divisors (101058333).

505165611667 is a wasteful number, since it uses less digits than its factorization.

505165611667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101058332.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 505165611667 in words is "five hundred five billion, one hundred sixty-five million, six hundred eleven thousand, six hundred sixty-seven".