1066421340 has 72 divisors (see below), whose sum is σ = 3239592720. Its totient is φ = 283958784.

The previous prime is 1066421333. The next prime is 1066421387. The reversal of 1066421340 is 431246601.

1066421340 is a `hidden beast` number, since 1 + 0 + 6 + 642 + 13 + 4 + 0 = 666.

1066421340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1066421340² = 2274508948814791200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129012 + ... + 137028.

Almost surely, 2^1066421340 is an apocalyptic number.

1066421340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066421340 is an abundant number, since it is smaller than the sum of its proper divisors (2173171380).

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

1066421340 is a wasteful number, since it uses less digits than its factorization.

1066421340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8771 (or 8766 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1066421340 is about 32656.1072389224. The cubic root of 1066421340 is about 1021.6675721276.

Adding to 1066421340 its reverse (431246601), we get a palindrome (1497667941).

The spelling of 1066421340 in words is "one billion, sixty-six million, four hundred twenty-one thousand, three hundred forty".