844460221066 has 64 divisors (see below), whose sum is σ = 1625410934784. Its totient is φ = 319431816000.

The previous prime is 844460221061. The next prime is 844460221097. The reversal of 844460221066 is 660122064448.

It is a super-2 number, since 2×844460221066² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (844460221061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2502291 + ... + 2819641.

It is an arithmetic number, because the mean of its divisors is an integer number (25397045856).

Almost surely, 2^844460221066 is an apocalyptic number.

844460221066 is a deficient number, since it is larger than the sum of its proper divisors (780950713718).

844460221066 is a wasteful number, since it uses less digits than its factorization.

844460221066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317875.

The product of its (nonzero) digits is 442368, while the sum is 43.

The spelling of 844460221066 in words is "eight hundred forty-four billion, four hundred sixty million, two hundred twenty-one thousand, sixty-six".