1066405120 has 288 divisors, whose sum is σ = 3019887360. Its totient is φ = 356843520.

The previous prime is 1066405063. The next prime is 1066405129. The reversal of 1066405120 is 215046601.

It is a super-2 number, since 2×1066405120² = 2274439759924428800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066405129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11982036 + ... + 11982124.

It is an arithmetic number, because the mean of its divisors is an integer number (10485720).

Almost surely, 2^1066405120 is an apocalyptic number.

1066405120 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 1066405120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1509943680).

1066405120 is an abundant number, since it is smaller than the sum of its proper divisors (1953482240).

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

1066405120 is a wasteful number, since it uses less digits than its factorization.

1066405120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1066405120 is about 32655.8588923948. The cubic root of 1066405120 is about 1021.6623923325.

The spelling of 1066405120 in words is "one billion, sixty-six million, four hundred five thousand, one hundred twenty".