65664367 has 4 divisors (see below), whose sum is σ = 65833560. Its totient is φ = 65495176.

The previous prime is 65664341. The next prime is 65664383. The reversal of 65664367 is 76346656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65664367 - 2⁷ = 65664239 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 (65664317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84013 + ... + 84790.

It is an arithmetic number, because the mean of its divisors is an integer number (16458390).

Almost surely, 2^65664367 is an apocalyptic number.

65664367 is a deficient number, since it is larger than the sum of its proper divisors (169193).

65664367 is a wasteful number, since it uses less digits than its factorization.

65664367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169192.

The product of its digits is 544320, while the sum is 43.

The square root of 65664367 is about 8103.3552927167. The cubic root of 65664367 is about 403.4378004257.

The spelling of 65664367 in words is "sixty-five million, six hundred sixty-four thousand, three hundred sixty-seven".