65611055005 has 4 divisors (see below), whose sum is σ = 78733266012. Its totient is φ = 52488844000.

The previous prime is 65611054997. The next prime is 65611055011. The reversal of 65611055005 is 50055011656.

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 27882654361 + 37728400644 = 166981^2 + 194238^2 .

It is not a de Polignac number, because 65611055005 - 2³ = 65611054997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6561105496 + ... + 6561105505.

It is an arithmetic number, because the mean of its divisors is an integer number (19683316503).

Almost surely, 2^65611055005 is an apocalyptic number.

It is an amenable number.

65611055005 is a deficient number, since it is larger than the sum of its proper divisors (13122211007).

65611055005 is a wasteful number, since it uses less digits than its factorization.

65611055005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13122211006.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 65611055005 in words is "sixty-five billion, six hundred eleven million, fifty-five thousand, five".