2166511166 has 8 divisors (see below), whose sum is σ = 3250983360. Its totient is φ = 1082850048.

The previous prime is 2166511153. The next prime is 2166511189. The reversal of 2166511166 is 6611156612.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 196046 + ... + 206801.

It is an arithmetic number, because the mean of its divisors is an integer number (406372920).

Almost surely, 2^2166511166 is an apocalyptic number.

2166511166 is a deficient number, since it is larger than the sum of its proper divisors (1084472194).

2166511166 is a wasteful number, since it uses less digits than its factorization.

2166511166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405538.

The product of its digits is 12960, while the sum is 35.

The square root of 2166511166 is about 46545.7964374872. The cubic root of 2166511166 is about 1293.9583890294.

Adding to 2166511166 its reverse (6611156612), we get a palindrome (8777667778).

The spelling of 2166511166 in words is "two billion, one hundred sixty-six million, five hundred eleven thousand, one hundred sixty-six".