4664255221 has 4 divisors (see below), whose sum is σ = 4682404332. Its totient is φ = 4646106112.

The previous prime is 4664255179. The next prime is 4664255251. The reversal of 4664255221 is 1225524664.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2576679121 + 2087576100 = 50761^2 + 45690^2 .

It is a cyclic number.

It is not a de Polignac number, because 4664255221 - 2²³ = 4655866613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4664255251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9074170 + ... + 9074683.

It is an arithmetic number, because the mean of its divisors is an integer number (1170601083).

Almost surely, 2^4664255221 is an apocalyptic number.

It is an amenable number.

4664255221 is a deficient number, since it is larger than the sum of its proper divisors (18149111).

4664255221 is a wasteful number, since it uses less digits than its factorization.

4664255221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18149110.

The product of its digits is 115200, while the sum is 37.

The square root of 4664255221 is about 68295.3528506882. The cubic root of 4664255221 is about 1670.8114216903.

Adding to 4664255221 its reverse (1225524664), we get a palindrome (5889779885).

The spelling of 4664255221 in words is "four billion, six hundred sixty-four million, two hundred fifty-five thousand, two hundred twenty-one".