65555664361 has 4 divisors (see below), whose sum is σ = 71515270224. Its totient is φ = 59596058500.

The previous prime is 65555664353. The next prime is 65555664373. The reversal of 65555664361 is 16346655556.

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 not a de Polignac number, because 65555664361 - 2³ = 65555664353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65555664299 and 65555664308.

It is not an unprimeable number, because it can be changed into a prime (65555664301) 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, 2979802915 + ... + 2979802936.

It is an arithmetic number, because the mean of its divisors is an integer number (17878817556).

Almost surely, 2^65555664361 is an apocalyptic number.

It is an amenable number.

65555664361 is a deficient number, since it is larger than the sum of its proper divisors (5959605863).

65555664361 is a wasteful number, since it uses less digits than its factorization.

65555664361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5959605862.

The product of its digits is 9720000, while the sum is 52.

It can be divided in two parts, 655556 and 64361, that added together give a palindrome (719917).

The spelling of 65555664361 in words is "sixty-five billion, five hundred fifty-five million, six hundred sixty-four thousand, three hundred sixty-one".