65555 has 8 divisors (see below), whose sum is σ = 89952. Its totient is φ = 44928.

The previous prime is 65551. The next prime is 65557. The reversal of 65555 is 55556.

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 65555 - 2² = 65551 is a prime.

It is a Duffinian number.

65555 is a modest number, since divided by 555 gives 65 as remainder.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (65551) 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, 902 + ... + 971.

It is an arithmetic number, because the mean of its divisors is an integer number (11244).

2⁶⁵⁵⁵⁵ is an apocalyptic number.

65555 is a deficient number, since it is larger than the sum of its proper divisors (24397).

65555 is a wasteful number, since it uses less digits than its factorization.

65555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885.

The product of its digits is 3750, while the sum is 26.

The square root of 65555 is about 256.0371066857. The cubic root of 65555 is about 40.3213694604.

Subtracting from 65555 its reverse (55556), we obtain a palindrome (9999).

The spelling of 65555 in words is "sixty-five thousand, five hundred fifty-five".