166836091850 has 12 divisors (see below), whose sum is σ = 310315130934. Its totient is φ = 66734436720.

The previous prime is 166836091813. The next prime is 166836091853. The reversal of 166836091850 is 58190638661.

It can be written as a sum of positive squares in 3 ways, for example, as 138170554369 + 28665537481 = 371713^2 + 169309^2 .

It is a junction number, because it is equal to n+sod(n) for n = 166836091792 and 166836091801.

It is not an unprimeable number, because it can be changed into a prime (166836091853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1668360869 + ... + 1668360968.

Almost surely, 2^166836091850 is an apocalyptic number.

166836091850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166836091850 is a deficient number, since it is larger than the sum of its proper divisors (143479039084).

166836091850 is a wasteful number, since it uses less digits than its factorization.

166836091850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336721849 (or 3336721844 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 166836091850 in words is "one hundred sixty-six billion, eight hundred thirty-six million, ninety-one thousand, eight hundred fifty".