166841794512 has 120 divisors (see below), whose sum is σ = 483290689440. Its totient is φ = 53666807040.

The previous prime is 166841794507. The next prime is 166841794517. The reversal of 166841794512 is 215497148661.

166841794512 is a `hidden beast` number, since 16 + 6 + 8 + 4 + 179 + 451 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (166841794507) and next prime (166841794517).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166841794517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8388003 + ... + 8407869.

It is an arithmetic number, because the mean of its divisors is an integer number (4027422412).

Almost surely, 2^166841794512 is an apocalyptic number.

166841794512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166841794512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241645344720).

166841794512 is an abundant number, since it is smaller than the sum of its proper divisors (316448894928).

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

166841794512 is a wasteful number, since it uses less digits than its factorization.

166841794512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21921 (or 21912 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 166841794512 in words is "one hundred sixty-six billion, eight hundred forty-one million, seven hundred ninety-four thousand, five hundred twelve".