65664111 has 16 divisors (see below), whose sum is σ = 88922880. Its totient is φ = 43095360.

The previous prime is 65664101. The next prime is 65664127. The reversal of 65664111 is 11146656.

It is a de Polignac number, because none of the positive numbers 2^k-65664111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65664101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88006 + ... + 88748.

It is an arithmetic number, because the mean of its divisors is an integer number (5557680).

Almost surely, 2^65664111 is an apocalyptic number.

65664111 is a deficient number, since it is larger than the sum of its proper divisors (23258769).

65664111 is a wasteful number, since it uses less digits than its factorization.

65664111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166.

The product of its digits is 4320, while the sum is 30.

The square root of 65664111 is about 8103.3394967754. The cubic root of 65664111 is about 403.4372761423.

The spelling of 65664111 in words is "sixty-five million, six hundred sixty-four thousand, one hundred eleven".