1066559900 has 72 divisors (see below), whose sum is σ = 2650309536. Its totient is φ = 364953600.

The previous prime is 1066559873. The next prime is 1066559909. The reversal of 1066559900 is 99556601.

It is a super-2 number, since 2×1066559900² = 2275100040576020000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066559909) 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 23 ways as a sum of consecutive naturals, for example, 447512 + ... + 449888.

Almost surely, 2^1066559900 is an apocalyptic number.

1066559900 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 1066559900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325154768).

1066559900 is an abundant number, since it is smaller than the sum of its proper divisors (1583749636).

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

1066559900 is a wasteful number, since it uses less digits than its factorization.

1066559900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039 (or 3032 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 1066559900 is about 32658.2286721126. The cubic root of 1066559900 is about 1021.7118185940.

The spelling of 1066559900 in words is "one billion, sixty-six million, five hundred fifty-nine thousand, nine hundred".