220020260666 has 8 divisors (see below), whose sum is σ = 330033028980. Its totient is φ = 110009251008.

The previous prime is 220020260639. The next prime is 220020260683. The reversal of 220020260666 is 666062020022.

It can be written as a sum of positive squares in 2 ways, for example, as 220003212025 + 17048641 = 469045^2 + 4129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 62021 + ... + 666248.

Almost surely, 2^220020260666 is an apocalyptic number.

220020260666 is a deficient number, since it is larger than the sum of its proper divisors (110012768314).

220020260666 is a wasteful number, since it uses less digits than its factorization.

220020260666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879328.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 220020260666 its reverse (666062020022), we get a palindrome (886082280688).

The spelling of 220020260666 in words is "two hundred twenty billion, twenty million, two hundred sixty thousand, six hundred sixty-six".