105666521696 has 24 divisors (see below), whose sum is σ = 208078985520. Its totient is φ = 52821065088.

The previous prime is 105666521693. The next prime is 105666521713. The reversal of 105666521696 is 696125666501.

It is a super-2 number, since 2×105666521696² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105666521693) 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, 239516 + ... + 518363.

It is an arithmetic number, because the mean of its divisors is an integer number (8669957730).

Almost surely, 2^105666521696 is an apocalyptic number.

105666521696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

105666521696 is a deficient number, since it is larger than the sum of its proper divisors (102412463824).

105666521696 is an equidigital number, since it uses as much as digits as its factorization.

105666521696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762246 (or 762238 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 105666521696 in words is "one hundred five billion, six hundred sixty-six million, five hundred twenty-one thousand, six hundred ninety-six".