1166646165 has 16 divisors (see below), whose sum is σ = 1976436288. Its totient is φ = 585610496.

The previous prime is 1166646127. The next prime is 1166646193. The reversal of 1166646165 is 5616466611.

It is a cyclic number.

It is not a de Polignac number, because 1166646165 - 2⁹ = 1166645653 is a prime.

It is a super-2 number, since 2×1166646165² = 2722126548618414450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2287287 + ... + 2287796.

It is an arithmetic number, because the mean of its divisors is an integer number (123527268).

Almost surely, 2^1166646165 is an apocalyptic number.

1166646165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166646165 is a deficient number, since it is larger than the sum of its proper divisors (809790123).

1166646165 is a wasteful number, since it uses less digits than its factorization.

1166646165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575108.

The product of its digits is 155520, while the sum is 42.

The square root of 1166646165 is about 34156.2024382103. The cubic root of 1166646165 is about 1052.7204331019.

The spelling of 1166646165 in words is "one billion, one hundred sixty-six million, six hundred forty-six thousand, one hundred sixty-five".