65550120101 has 4 divisors (see below), whose sum is σ = 67810469100. Its totient is φ = 63289771104.

The previous prime is 65550120091. The next prime is 65550120109. The reversal of 65550120101 is 10102105556.

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 30309069025 + 35241051076 = 174095^2 + 187726^2 .

It is a cyclic number.

It is not a de Polignac number, because 65550120101 - 2¹⁰ = 65550119077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65550120109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130174456 + ... + 1130174513.

It is an arithmetic number, because the mean of its divisors is an integer number (16952617275).

Almost surely, 2^65550120101 is an apocalyptic number.

It is an amenable number.

65550120101 is a deficient number, since it is larger than the sum of its proper divisors (2260348999).

65550120101 is a wasteful number, since it uses less digits than its factorization.

65550120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260348998.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 65550120101 its reverse (10102105556), we get a palindrome (75652225657).

The spelling of 65550120101 in words is "sixty-five billion, five hundred fifty million, one hundred twenty thousand, one hundred one".