1166620209 has 8 divisors (see below), whose sum is σ = 1559087712. Its totient is φ = 775949760.

The previous prime is 1166620201. The next prime is 1166620243. The reversal of 1166620209 is 9020266611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1166620209 - 2³ = 1166620201 is a prime.

It is a super-2 number, since 2×1166620209² = 2722005424094407362, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1166620209.

It is not an unprimeable number, because it can be changed into a prime (1166620201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447747 + ... + 450344.

It is an arithmetic number, because the mean of its divisors is an integer number (194885964).

Almost surely, 2^1166620209 is an apocalyptic number.

It is an amenable number.

1166620209 is a deficient number, since it is larger than the sum of its proper divisors (392467503).

1166620209 is an equidigital number, since it uses as much as digits as its factorization.

1166620209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898527.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1166620209 is about 34155.8224758239. The cubic root of 1166620209 is about 1052.7126259321.

The spelling of 1166620209 in words is "one billion, one hundred sixty-six million, six hundred twenty thousand, two hundred nine".