65800013 has 8 divisors (see below), whose sum is σ = 70289208. Its totient is φ = 61379584.

The previous prime is 65800001. The next prime is 65800027. The reversal of 65800013 is 31000856.

It can be written as a sum of positive squares in 4 ways, for example, as 157609 + 65642404 = 397^2 + 8102^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65800013 - 2⁴ = 65799997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65800093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15206 + ... + 19047.

It is an arithmetic number, because the mean of its divisors is an integer number (8786151).

Almost surely, 2^65800013 is an apocalyptic number.

It is an amenable number.

65800013 is a deficient number, since it is larger than the sum of its proper divisors (4489195).

65800013 is a wasteful number, since it uses less digits than its factorization.

65800013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34383.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 65800013 is about 8111.7207175790. The cubic root of 65800013 is about 403.7154095617.

Adding to 65800013 its reverse (31000856), we get a palindrome (96800869).

The spelling of 65800013 in words is "sixty-five million, eight hundred thousand, thirteen".