664234222 has 4 divisors (see below), whose sum is σ = 996351336. Its totient is φ = 332117110.

The previous prime is 664234199. The next prime is 664234229. The reversal of 664234222 is 222432466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222432466 = 2 ⋅111216233.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664234229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166058554 + ... + 166058557.

It is an arithmetic number, because the mean of its divisors is an integer number (249087834).

Almost surely, 2^664234222 is an apocalyptic number.

664234222 is a deficient number, since it is larger than the sum of its proper divisors (332117114).

664234222 is a wasteful number, since it uses less digits than its factorization.

664234222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332117113.

The product of its digits is 27648, while the sum is 31.

The square root of 664234222 is about 25772.7418409451. The cubic root of 664234222 is about 872.5167018420.

Adding to 664234222 its reverse (222432466), we get a palindrome (886666688).

The spelling of 664234222 in words is "six hundred sixty-four million, two hundred thirty-four thousand, two hundred twenty-two".