1066890984840 has 192 divisors, whose sum is σ = 3598812322560. Its totient is φ = 284267335680.

The previous prime is 1066890984751. The next prime is 1066890984847. The reversal of 1066890984840 is 484890986601.

1066890984840 is a `hidden beast` number, since 1 + 0 + 6 + 68 + 9 + 0 + 98 + 484 + 0 = 666.

It is a super-2 number, since 2×1066890984840² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066890984847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11784145 + ... + 11874335.

It is an arithmetic number, because the mean of its divisors is an integer number (18743814180).

Almost surely, 2^{1066890984840} is an apocalyptic number.

1066890984840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066890984840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1799406161280).

1066890984840 is an abundant number, since it is smaller than the sum of its proper divisors (2531921337720).

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

1066890984840 is a wasteful number, since it uses less digits than its factorization.

1066890984840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91434 (or 91418 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The spelling of 1066890984840 in words is "one trillion, sixty-six billion, eight hundred ninety million, nine hundred eighty-four thousand, eight hundred forty".