65855855 has 16 divisors (see below), whose sum is σ = 86278080. Its totient is φ = 47962368.

The previous prime is 65855851. The next prime is 65855861. The reversal of 65855855 is 55855856.

It is a cyclic number.

It is not a de Polignac number, because 65855855 - 2² = 65855851 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65855851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2195 + ... + 11684.

It is an arithmetic number, because the mean of its divisors is an integer number (5392380).

Almost surely, 2^65855855 is an apocalyptic number.

65855855 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

65855855 is a deficient number, since it is larger than the sum of its proper divisors (20422225).

65855855 is a wasteful number, since it uses less digits than its factorization.

65855855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13970.

The product of its digits is 1200000, while the sum is 47.

The square root of 65855855 is about 8115.1620439767. The cubic root of 65855855 is about 403.8295833052.

Subtracting from 65855855 its reverse (55855856), we obtain a palindrome (9999999).

The spelling of 65855855 in words is "sixty-five million, eight hundred fifty-five thousand, eight hundred fifty-five".