65625011065 has 4 divisors (see below), whose sum is σ = 78750013284. Its totient is φ = 52500008848.

The previous prime is 65625011063. The next prime is 65625011099. The reversal of 65625011065 is 56011052656.

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 14626725481 + 50998285584 = 120941^2 + 225828^2 .

It is a cyclic number.

It is not a de Polignac number, because 65625011065 - 2¹ = 65625011063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65625011063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6562501102 + ... + 6562501111.

It is an arithmetic number, because the mean of its divisors is an integer number (19687503321).

Almost surely, 2^65625011065 is an apocalyptic number.

It is an amenable number.

65625011065 is a deficient number, since it is larger than the sum of its proper divisors (13125002219).

65625011065 is a wasteful number, since it uses less digits than its factorization.

65625011065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13125002218.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 65625011065 in words is "sixty-five billion, six hundred twenty-five million, eleven thousand, sixty-five".