1066320656 has 10 divisors (see below), whose sum is σ = 2065996302. Its totient is φ = 533160320.

The previous prime is 1066320637. The next prime is 1066320667. The reversal of 1066320656 is 6560236601.

1066320656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1050797056 + 15523600 = 32416^2 + 3940^2 .

It is a super-2 number, since 2×1066320656² = 2274079482824540672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33322505 + ... + 33322536.

Almost surely, 2^1066320656 is an apocalyptic number.

1066320656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1066320656 is a deficient number, since it is larger than the sum of its proper divisors (999675646).

1066320656 is an equidigital number, since it uses as much as digits as its factorization.

1066320656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66645049 (or 66645043 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 1066320656 is about 32654.5656225894. The cubic root of 1066320656 is about 1021.6354182276.

The spelling of 1066320656 in words is "one billion, sixty-six million, three hundred twenty thousand, six hundred fifty-six".