1066463163440 has 80 divisors (see below), whose sum is σ = 2533810245408. Its totient is φ = 417293979648.

The previous prime is 1066463163433. The next prime is 1066463163443. The reversal of 1066463163440 is 443613646601.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1066463163440² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066463163391 and 1066463163400.

It is not an unprimeable number, because it can be changed into a prime (1066463163443) 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 15 ways as a sum of consecutive naturals, for example, 1055699 + ... + 1802061.

Almost surely, 2^{1066463163440} is an apocalyptic number.

1066463163440 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 1066463163440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266905122704).

1066463163440 is an abundant number, since it is smaller than the sum of its proper divisors (1467347081968).

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

1066463163440 is a wasteful number, since it uses less digits than its factorization.

1066463163440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746766 (or 746760 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 44.

The spelling of 1066463163440 in words is "one trillion, sixty-six billion, four hundred sixty-three million, one hundred sixty-three thousand, four hundred forty".