20066650105 has 4 divisors (see below), whose sum is σ = 24079980132. Its totient is φ = 16053320080.

The previous prime is 20066650103. The next prime is 20066650181. The reversal of 20066650105 is 50105666002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2814090304 + 17252559801 = 53048^2 + 131349^2 .

It is not a de Polignac number, because 20066650105 - 2¹ = 20066650103 is a prime.

It is a super-2 number, since 2×20066650105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20066650103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006665006 + ... + 2006665015.

It is an arithmetic number, because the mean of its divisors is an integer number (6019995033).

Almost surely, 2^20066650105 is an apocalyptic number.

It is an amenable number.

20066650105 is a deficient number, since it is larger than the sum of its proper divisors (4013330027).

20066650105 is an equidigital number, since it uses as much as digits as its factorization.

20066650105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013330026.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 20066650105 in words is "twenty billion, sixty-six million, six hundred fifty thousand, one hundred five".