105666521711 has 4 divisors (see below), whose sum is σ = 106127947800. Its totient is φ = 105205095624.

The previous prime is 105666521693. The next prime is 105666521713. The reversal of 105666521711 is 117125666501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117125666501 = 257 ⋅455741893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105666521711 is a prime.

It is a super-2 number, since 2×105666521711² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105666521713) 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, 230712701 + ... + 230713158.

It is an arithmetic number, because the mean of its divisors is an integer number (26531986950).

Almost surely, 2^105666521711 is an apocalyptic number.

105666521711 is a deficient number, since it is larger than the sum of its proper divisors (461426089).

105666521711 is an equidigital number, since it uses as much as digits as its factorization.

105666521711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461426088.

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 105666521711 in words is "one hundred five billion, six hundred sixty-six million, five hundred twenty-one thousand, seven hundred eleven".