1044451221066 has 128 divisors (see below), whose sum is σ = 2594552083200. Its totient is φ = 308686464000.

The previous prime is 1044451221061. The next prime is 1044451221133. The reversal of 1044451221066 is 6601221544401.

1044451221066 is a `hidden beast` number, since 104 + 445 + 1 + 2 + 2 + 106 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1044451221066.

It is not an unprimeable number, because it can be changed into a prime (1044451221061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 152671806 + ... + 152678646.

It is an arithmetic number, because the mean of its divisors is an integer number (20269938150).

Almost surely, 2^{1044451221066} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1044451221066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297276041600).

1044451221066 is an abundant number, since it is smaller than the sum of its proper divisors (1550100862134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1044451221066 is a wasteful number, since it uses less digits than its factorization.

1044451221066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13173 (or 13167 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 1044451221066 its reverse (6601221544401), we get a palindrome (7645672765467).

The spelling of 1044451221066 in words is "one trillion, forty-four billion, four hundred fifty-one million, two hundred twenty-one thousand, sixty-six".