1066646611 has 6 divisors (see below), whose sum is σ = 1093298636. Its totient is φ = 1040629200.

The previous prime is 1066646599. The next prime is 1066646627. The reversal of 1066646611 is 1166466601.

It is not a de Polignac number, because 1066646611 - 2⁵ = 1066646579 is a prime.

It is a super-2 number, since 2×1066646611² = 2275469985515570642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066640611) 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 5 ways as a sum of consecutive naturals, for example, 315585 + ... + 318946.

Almost surely, 2^1066646611 is an apocalyptic number.

1066646611 is a deficient number, since it is larger than the sum of its proper divisors (26652025).

1066646611 is an frugal number, since it uses more digits than its factorization.

1066646611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634613 (or 634572 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1066646611 is about 32659.5561972296. The cubic root of 1066646611 is about 1021.7395061319.

The spelling of 1066646611 in words is "one billion, sixty-six million, six hundred forty-six thousand, six hundred eleven".