1066664120 has 128 divisors (see below), whose sum is σ = 2589788160. Its totient is φ = 394606080.

The previous prime is 1066664069. The next prime is 1066664129. The reversal of 1066664120 is 214666601.

It is a super-2 number, since 2×1066664120² = 2275544689790748800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066664129) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3073787 + ... + 3074133.

It is an arithmetic number, because the mean of its divisors is an integer number (20232720).

Almost surely, 2^1066664120 is an apocalyptic number.

1066664120 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 1066664120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294894080).

1066664120 is an abundant number, since it is smaller than the sum of its proper divisors (1523124040).

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

1066664120 is a wasteful number, since it uses less digits than its factorization.

1066664120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1066664120 is about 32659.8242493740. The cubic root of 1066664120 is about 1021.7450967180.

The spelling of 1066664120 in words is "one billion, sixty-six million, six hundred sixty-four thousand, one hundred twenty".