65535681 has 8 divisors (see below), whose sum is σ = 88197984. Its totient is φ = 43281920.

The previous prime is 65535667. The next prime is 65535689. The reversal of 65535681 is 18653556.

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 65535681 - 2⁵ = 65535649 is a prime.

It is a super-2 number, since 2×65535681² = 8589850968267522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65535689) 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, 101760 + ... + 102401.

It is an arithmetic number, because the mean of its divisors is an integer number (11024748).

Almost surely, 2^65535681 is an apocalyptic number.

It is an amenable number.

65535681 is a deficient number, since it is larger than the sum of its proper divisors (22662303).

65535681 is a wasteful number, since it uses less digits than its factorization.

65535681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204271.

The product of its digits is 108000, while the sum is 39.

The square root of 65535681 is about 8095.4111075349. The cubic root of 65535681 is about 403.1740818071.

The spelling of 65535681 in words is "sixty-five million, five hundred thirty-five thousand, six hundred eighty-one".