65338645 has 4 divisors (see below), whose sum is σ = 78406380. Its totient is φ = 52270912.

The previous prime is 65338643. The next prime is 65338649. The reversal of 65338645 is 54683356.

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 38651089 + 26687556 = 6217^2 + 5166^2 .

It is a cyclic number.

It is not a de Polignac number, because 65338645 - 2¹ = 65338643 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 65338598 and 65338607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65338643) 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, 6533860 + ... + 6533869.

It is an arithmetic number, because the mean of its divisors is an integer number (19601595).

Almost surely, 2^65338645 is an apocalyptic number.

It is an amenable number.

65338645 is a deficient number, since it is larger than the sum of its proper divisors (13067735).

65338645 is a wasteful number, since it uses less digits than its factorization.

65338645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13067734.

The product of its digits is 259200, while the sum is 40.

The square root of 65338645 is about 8083.2323361388. The cubic root of 65338645 is about 402.7696224675.

The spelling of 65338645 in words is "sixty-five million, three hundred thirty-eight thousand, six hundred forty-five".