1006661611 has 2 divisors, whose sum is σ = 1006661612. Its totient is φ = 1006661610.

The previous prime is 1006661609. The next prime is 1006661639. The reversal of 1006661611 is 1161666001.

It is an a-pointer prime, because the next prime (1006661639) can be obtained adding 1006661611 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (1161666001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1006661611 - 2¹ = 1006661609 is a prime.

It is a super-2 number, since 2×1006661611² = 2026735198122230642, which contains 22 as substring.

Together with 1006661609, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1006661611.

It is not a weakly prime, because it can be changed into another prime (1006661641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503330805 + 503330806.

It is an arithmetic number, because the mean of its divisors is an integer number (503330806).

Almost surely, 2^1006661611 is an apocalyptic number.

1006661611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006661611 is an equidigital number, since it uses as much as digits as its factorization.

1006661611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1006661611 is about 31727.9310860321. The cubic root of 1006661611 is about 1002.2156243831.

The spelling of 1006661611 in words is "one billion, six million, six hundred sixty-one thousand, six hundred eleven".