65162621665 has 4 divisors (see below), whose sum is σ = 78195146004. Its totient is φ = 52130097328.

The previous prime is 65162621651. The next prime is 65162621707. The reversal of 65162621665 is 56612626156.

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 24400626849 + 40761994816 = 156207^2 + 201896^2 .

It is a cyclic number.

It is not a de Polignac number, because 65162621665 - 2⁵ = 65162621633 is a prime.

It is a Duffinian 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, 6516262162 + ... + 6516262171.

It is an arithmetic number, because the mean of its divisors is an integer number (19548786501).

Almost surely, 2^65162621665 is an apocalyptic number.

It is an amenable number.

65162621665 is a deficient number, since it is larger than the sum of its proper divisors (13032524339).

65162621665 is a wasteful number, since it uses less digits than its factorization.

65162621665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13032524338.

The product of its digits is 777600, while the sum is 46.

The spelling of 65162621665 in words is "sixty-five billion, one hundred sixty-two million, six hundred twenty-one thousand, six hundred sixty-five".