1066121340 has 96 divisors (see below), whose sum is σ = 3174583104. Its totient is φ = 266403840.

The previous prime is 1066121333. The next prime is 1066121347. The reversal of 1066121340 is 431216601.

It is an interprime number because it is at equal distance from previous prime (1066121333) and next prime (1066121347).

It is a super-2 number, since 2×1066121340² = 2273229423206791200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066121340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066121347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243652 + ... + 247988.

It is an arithmetic number, because the mean of its divisors is an integer number (33068574).

Almost surely, 2^1066121340 is an apocalyptic number.

1066121340 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 1066121340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1587291552).

1066121340 is an abundant number, since it is smaller than the sum of its proper divisors (2108461764).

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

1066121340 is a wasteful number, since it uses less digits than its factorization.

1066121340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607 (or 4605 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1066121340 is about 32651.5135943190. The cubic root of 1066121340 is about 1021.5717597735.

Adding to 1066121340 its reverse (431216601), we get a palindrome (1497337941).

The spelling of 1066121340 in words is "one billion, sixty-six million, one hundred twenty-one thousand, three hundred forty".