65622222655 has 16 divisors (see below), whose sum is σ = 86101171200. Its totient is φ = 47616521760.

The previous prime is 65622222593. The next prime is 65622222671. The reversal of 65622222655 is 55622222656.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-65622222655 is a prime.

It is a super-2 number, since 2×65622222655² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1334775 + ... + 1383064.

It is an arithmetic number, because the mean of its divisors is an integer number (5381323200).

Almost surely, 2^65622222655 is an apocalyptic number.

65622222655 is a deficient number, since it is larger than the sum of its proper divisors (20478948545).

65622222655 is a wasteful number, since it uses less digits than its factorization.

65622222655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718294.

The product of its digits is 864000, while the sum is 43.

Subtracting from 65622222655 its reverse (55622222656), we obtain a palindrome (9999999999).

The spelling of 65622222655 in words is "sixty-five billion, six hundred twenty-two million, two hundred twenty-two thousand, six hundred fifty-five".