1066600000 has 84 divisors (see below), whose sum is σ = 2645994708. Its totient is φ = 426560000.

The previous prime is 1066599997. The next prime is 1066600039. The reversal of 1066600000 is 66601.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 522031104 + 544568896 = 22848^2 + 23336^2 .

It is a super-2 number, since 2×1066600000² = 2275271120000000000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197334 + ... + 202666.

It is an arithmetic number, because the mean of its divisors is an integer number (31499937).

Almost surely, 2^1066600000 is an apocalyptic number.

1066600000 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 1066600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322997354).

1066600000 is an abundant number, since it is smaller than the sum of its proper divisors (1579394708).

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

1066600000 is an frugal number, since it uses more digits than its factorization.

1066600000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5370 (or 5340 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1066600000 is about 32658.8426004352. The cubic root of 1066600000 is about 1021.7246230415.

Adding to 1066600000 its reverse (66601), we get a palindrome (1066666601).

The spelling of 1066600000 in words is "one billion, sixty-six million, six hundred thousand".