2688891166 has 8 divisors (see below), whose sum is σ = 4343593464. Its totient is φ = 1241026680.

The previous prime is 2688891143. The next prime is 2688891167. The reversal of 2688891166 is 6611988862.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688891167) 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 3 ways as a sum of consecutive naturals, for example, 51709420 + ... + 51709471.

It is an arithmetic number, because the mean of its divisors is an integer number (542949183).

Almost surely, 2^2688891166 is an apocalyptic number.

2688891166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2688891166 is a deficient number, since it is larger than the sum of its proper divisors (1654702298).

2688891166 is a wasteful number, since it uses less digits than its factorization.

2688891166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103418906.

The product of its digits is 1990656, while the sum is 55.

The square root of 2688891166 is about 51854.5192437458. The cubic root of 2688891166 is about 1390.5642975622.

The spelling of 2688891166 in words is "two billion, six hundred eighty-eight million, eight hundred ninety-one thousand, one hundred sixty-six".