65663431013213 has 32 divisors (see below), whose sum is σ = 77160611404800. Its totient is φ = 55234154707200.

The previous prime is 65663431013171. The next prime is 65663431013227. The reversal of 65663431013213 is 31231013436656.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 65663431013213 - 2³⁸ = 65388553106269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65663431013293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179476373 + ... + 179841861.

It is an arithmetic number, because the mean of its divisors is an integer number (2411269106400).

Almost surely, 2^{65663431013213} is an apocalyptic number.

It is an amenable number.

65663431013213 is a deficient number, since it is larger than the sum of its proper divisors (11497180391587).

65663431013213 is a wasteful number, since it uses less digits than its factorization.

65663431013213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385553.

The product of its (nonzero) digits is 699840, while the sum is 44.

Adding to 65663431013213 its reverse (31231013436656), we get a palindrome (96894444449869).

The spelling of 65663431013213 in words is "sixty-five trillion, six hundred sixty-three billion, four hundred thirty-one million, thirteen thousand, two hundred thirteen".