105660606617021 has 4 divisors (see below), whose sum is σ = 105714763772544. Its totient is φ = 105606449461500.

The previous prime is 105660606616997. The next prime is 105660606617101. The reversal of 105660606617021 is 120716606066501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 105660606617021 - 2²² = 105660602422717 is a prime.

It is a super-2 number, since 2×105660606617021² (a number of 29 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 (105660606619021) 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, 27078574835 + ... + 27078578736.

It is an arithmetic number, because the mean of its divisors is an integer number (26428690943136).

Almost surely, 2^{105660606617021} is an apocalyptic number.

It is an amenable number.

105660606617021 is a deficient number, since it is larger than the sum of its proper divisors (54157155523).

105660606617021 is an equidigital number, since it uses as much as digits as its factorization.

105660606617021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54157155522.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 105660606617021 in words is "one hundred five trillion, six hundred sixty billion, six hundred six million, six hundred seventeen thousand, twenty-one".