1011666009 has 4 divisors (see below), whose sum is σ = 1348888016. Its totient is φ = 674444004.

The previous prime is 1011665989. The next prime is 1011666011. The reversal of 1011666009 is 9006661101.

It is a happy number.

1011666009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1011666009 - 2⁷ = 1011665881 is a prime.

It is a super-2 number, since 2×1011666009² = 2046936227531976162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011666079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168610999 + ... + 168611004.

It is an arithmetic number, because the mean of its divisors is an integer number (337222004).

Almost surely, 2^1011666009 is an apocalyptic number.

It is an amenable number.

1011666009 is a deficient number, since it is larger than the sum of its proper divisors (337222007).

1011666009 is an equidigital number, since it uses as much as digits as its factorization.

1011666009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337222006.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1011666009 is about 31806.6975494156. The cubic root of 1011666009 is about 1003.8736451650.

The spelling of 1011666009 in words is "one billion, eleven million, six hundred sixty-six thousand, nine".