166081181814 has 32 divisors (see below), whose sum is σ = 369156826080. Its totient is φ = 55347264000.

The previous prime is 166081181779. The next prime is 166081181857. The reversal of 166081181814 is 418181180661.

166081181814 is a `hidden beast` number, since 1 + 6 + 608 + 1 + 18 + 18 + 14 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 166081181814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133587 + ... + 591614.

It is an arithmetic number, because the mean of its divisors is an integer number (11536150815).

Almost surely, 2^166081181814 is an apocalyptic number.

166081181814 is an abundant number, since it is smaller than the sum of its proper divisors (203075644266).

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

166081181814 is a wasteful number, since it uses less digits than its factorization.

166081181814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729453 (or 729447 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The spelling of 166081181814 in words is "one hundred sixty-six billion, eighty-one million, one hundred eighty-one thousand, eight hundred fourteen".