1801818166 has 8 divisors (see below), whose sum is σ = 2706225984. Its totient is φ = 899742840.

The previous prime is 1801818163. The next prime is 1801818167. The reversal of 1801818166 is 6618181081.

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 (1801818163) 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, 581190 + ... + 584281.

It is an arithmetic number, because the mean of its divisors is an integer number (338278248).

Almost surely, 2^1801818166 is an apocalyptic number.

1801818166 is a deficient number, since it is larger than the sum of its proper divisors (904407818).

1801818166 is a wasteful number, since it uses less digits than its factorization.

1801818166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166246.

The product of its (nonzero) digits is 18432, while the sum is 40.

The square root of 1801818166 is about 42447.8287548374. The cubic root of 1801818166 is about 1216.8498336187.

The spelling of 1801818166 in words is "one billion, eight hundred one million, eight hundred eighteen thousand, one hundred sixty-six".