220666222004 has 6 divisors (see below), whose sum is σ = 386165888514. Its totient is φ = 110333111000.

The previous prime is 220666221991. The next prime is 220666222009. The reversal of 220666222004 is 400222666022.

It can be written as a sum of positive squares in only one way, i.e., 196557449104 + 24108772900 = 443348^2 + 155270^2 .

It is a super-2 number, since 2×220666222004² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220666222009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27583277747 + ... + 27583277754.

It is an arithmetic number, because the mean of its divisors is an integer number (64360981419).

Almost surely, 2^220666222004 is an apocalyptic number.

It is an amenable number.

220666222004 is a deficient number, since it is larger than the sum of its proper divisors (165499666510).

220666222004 is a wasteful number, since it uses less digits than its factorization.

220666222004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55166555505 (or 55166555503 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 220666222004 its reverse (400222666022), we get a palindrome (620888888026).

The spelling of 220666222004 in words is "two hundred twenty billion, six hundred sixty-six million, two hundred twenty-two thousand, four".