220006664 has 16 divisors (see below), whose sum is σ = 412672320. Its totient is φ = 109960720.

The previous prime is 220006651. The next prime is 220006669. The reversal of 220006664 is 466600022.

It is not an unprimeable number, because it can be changed into a prime (220006669) 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, 31997 + ... + 38259.

It is an arithmetic number, because the mean of its divisors is an integer number (25792020).

Almost surely, 2^220006664 is an apocalyptic number.

It is an amenable number.

220006664 is a deficient number, since it is larger than the sum of its proper divisors (192665656).

220006664 is a wasteful number, since it uses less digits than its factorization.

220006664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660 (or 10656 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 220006664 is about 14832.6216158844. The cubic root of 220006664 is about 603.6871689677.

Adding to 220006664 its reverse (466600022), we get a palindrome (686606686).

The spelling of 220006664 in words is "two hundred twenty million, six thousand, six hundred sixty-four".