1066442565220 has 48 divisors (see below), whose sum is σ = 2277002907648. Its totient is φ = 419470593920.

The previous prime is 1066442565187. The next prime is 1066442565241. The reversal of 1066442565220 is 225652446601.

It is a happy number.

1066442565220 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 2×1066442565220² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436579 + ... + 1524298.

It is an arithmetic number, because the mean of its divisors is an integer number (47437560576).

Almost surely, 2^{1066442565220} is an apocalyptic number.

1066442565220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066442565220 is an abundant number, since it is smaller than the sum of its proper divisors (1210560342428).

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

1066442565220 is a wasteful number, since it uses less digits than its factorization.

1066442565220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961340 (or 1961338 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 1066442565220 in words is "one trillion, sixty-six billion, four hundred forty-two million, five hundred sixty-five thousand, two hundred twenty".