65651560165 has 16 divisors (see below), whose sum is σ = 80712411696. Its totient is φ = 51234508800.

The previous prime is 65651560141. The next prime is 65651560243. The reversal of 65651560165 is 56106515656.

It can be written as a sum of positive squares in 8 ways, for example, as 1846881 + 65649713284 = 1359^2 + 256222^2 .

It is not a de Polignac number, because 65651560165 - 2⁵ = 65651560133 is a prime.

It is a super-2 number, since 2×65651560165² (a number of 22 digits) contains 22 as substring.

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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3484009 + ... + 3502801.

It is an arithmetic number, because the mean of its divisors is an integer number (5044525731).

Almost surely, 2^65651560165 is an apocalyptic number.

It is an amenable number.

65651560165 is a deficient number, since it is larger than the sum of its proper divisors (15060851531).

65651560165 is a wasteful number, since it uses less digits than its factorization.

65651560165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35880.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 65651560165 in words is "sixty-five billion, six hundred fifty-one million, five hundred sixty thousand, one hundred sixty-five".