1066646356 has 12 divisors (see below), whose sum is σ = 1875479200. Its totient is φ = 530795160.

The previous prime is 1066646353. The next prime is 1066646381. The reversal of 1066646356 is 6536466601.

It is a super-2 number, since 2×1066646356² = 2275468897536157472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066646353) 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 3 ways as a sum of consecutive naturals, for example, 631056 + ... + 632743.

Almost surely, 2^1066646356 is an apocalyptic number.

It is an amenable number.

1066646356 is a deficient number, since it is larger than the sum of its proper divisors (808832844).

1066646356 is a wasteful number, since it uses less digits than its factorization.

1066646356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264014 (or 1264012 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 1066646356 is about 32659.5522933184. The cubic root of 1066646356 is about 1021.7394247105.

The spelling of 1066646356 in words is "one billion, sixty-six million, six hundred forty-six thousand, three hundred fifty-six".