166861174230 has 128 divisors (see below), whose sum is σ = 477592329600. Its totient is φ = 41305116672.

The previous prime is 166861174223. The next prime is 166861174231. The reversal of 166861174230 is 32471168661.

166861174230 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 611 + 7 + 4 + 23 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166861174231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86076 + ... + 584064.

It is an arithmetic number, because the mean of its divisors is an integer number (3731190075).

Almost surely, 2^166861174230 is an apocalyptic number.

166861174230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166861174230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238796164800).

166861174230 is an abundant number, since it is smaller than the sum of its proper divisors (310731155370).

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

166861174230 is a wasteful number, since it uses less digits than its factorization.

166861174230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498095 (or 498089 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 166861174230 in words is "one hundred sixty-six billion, eight hundred sixty-one million, one hundred seventy-four thousand, two hundred thirty".