1166009911 has 16 divisors (see below), whose sum is σ = 1315398528. Its totient is φ = 1024452000.

The previous prime is 1166009903. The next prime is 1166009921. The reversal of 1166009911 is 1199006611.

It is not a de Polignac number, because 1166009911 - 2³ = 1166009903 is a prime.

It is a super-2 number, since 2×1166009911² = 2719158225100455842, which contains 22 as substring.

1166009911 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166009921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24136 + ... + 53986.

It is an arithmetic number, because the mean of its divisors is an integer number (82212408).

Almost surely, 2^1166009911 is an apocalyptic number.

1166009911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1166009911 is a deficient number, since it is larger than the sum of its proper divisors (149388617).

1166009911 is a wasteful number, since it uses less digits than its factorization.

1166009911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29982.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 1166009911 is about 34146.8872812735. The cubic root of 1166009911 is about 1052.5290241995.

The spelling of 1166009911 in words is "one billion, one hundred sixty-six million, nine thousand, nine hundred eleven".