105809866 has 8 divisors (see below), whose sum is σ = 158968224. Its totient is φ = 52820460.

The previous prime is 105809863. The next prime is 105809881. The reversal of 105809866 is 668908501.

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

It is a super-2 number, since 2×105809866² = 22391455485875912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105809861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40660 + ... + 43183.

It is an arithmetic number, because the mean of its divisors is an integer number (19871028).

Almost surely, 2^105809866 is an apocalyptic number.

105809866 is a deficient number, since it is larger than the sum of its proper divisors (53158358).

105809866 is an equidigital number, since it uses as much as digits as its factorization.

105809866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84476.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 105809866 is about 10286.3922732900. The cubic root of 105809866 is about 472.9792135230.

The spelling of 105809866 in words is "one hundred five million, eight hundred nine thousand, eight hundred sixty-six".