804123666186 has 32 divisors (see below), whose sum is σ = 1667321990208. Its totient is φ = 258352978560.

The previous prime is 804123666127. The next prime is 804123666223. The reversal of 804123666186 is 681666321408.

It is a super-2 number, since 2×804123666186² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19671121 + ... + 19711956.

It is an arithmetic number, because the mean of its divisors is an integer number (52103812194).

Almost surely, 2^804123666186 is an apocalyptic number.

804123666186 is an abundant number, since it is smaller than the sum of its proper divisors (863198324022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

804123666186 is a wasteful number, since it uses less digits than its factorization.

804123666186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39383206.

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 804123666186 in words is "eight hundred four billion, one hundred twenty-three million, six hundred sixty-six thousand, one hundred eighty-six".