4220055665 has 24 divisors (see below), whose sum is σ = 5893692840. Its totient is φ = 2892357888.

The previous prime is 4220055659. The next prime is 4220055689. The reversal of 4220055665 is 5665500224.

It can be written as a sum of positive squares in 4 ways, for example, as 824895841 + 3395159824 = 28721^2 + 58268^2 .

It is not a de Polignac number, because 4220055665 - 2⁶ = 4220055601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 995771 + ... + 999999.

It is an arithmetic number, because the mean of its divisors is an integer number (245570535).

Almost surely, 2^4220055665 is an apocalyptic number.

It is an amenable number.

4220055665 is a deficient number, since it is larger than the sum of its proper divisors (1673637175).

4220055665 is a wasteful number, since it uses less digits than its factorization.

4220055665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321 (or 8314 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 4220055665 is about 64961.9555201350. The cubic root of 4220055665 is about 1615.9926948468.

Adding to 4220055665 its reverse (5665500224), we get a palindrome (9885555889).

The spelling of 4220055665 in words is "four billion, two hundred twenty million, fifty-five thousand, six hundred sixty-five".