10221404666 has 64 divisors (see below), whose sum is σ = 18208717056. Its totient is φ = 4251340800.

The previous prime is 10221404663. The next prime is 10221404681. The reversal of 10221404666 is 66640412201.

10221404666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10221404666² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10221404663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1935806 + ... + 1941078.

It is an arithmetic number, because the mean of its divisors is an integer number (284511204).

Almost surely, 2^10221404666 is an apocalyptic number.

10221404666 is a deficient number, since it is larger than the sum of its proper divisors (7987312390).

10221404666 is a wasteful number, since it uses less digits than its factorization.

10221404666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5447.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 10221404666 its reverse (66640412201), we get a palindrome (76861816867).

The spelling of 10221404666 in words is "ten billion, two hundred twenty-one million, four hundred four thousand, six hundred sixty-six".