65663313 has 4 divisors (see below), whose sum is σ = 87551088. Its totient is φ = 43775540.

The previous prime is 65663291. The next prime is 65663347. The reversal of 65663313 is 31336656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65663313 - 2⁶ = 65663249 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65663393) 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, 10943883 + ... + 10943888.

It is an arithmetic number, because the mean of its divisors is an integer number (21887772).

Almost surely, 2^65663313 is an apocalyptic number.

It is an amenable number.

65663313 is a deficient number, since it is larger than the sum of its proper divisors (21887775).

65663313 is a wasteful number, since it uses less digits than its factorization.

65663313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21887774.

The product of its digits is 29160, while the sum is 33.

The square root of 65663313 is about 8103.2902576669. The cubic root of 65663313 is about 403.4356418439.

Adding to 65663313 its reverse (31336656), we get a palindrome (96999969).

The spelling of 65663313 in words is "sixty-five million, six hundred sixty-three thousand, three hundred thirteen".