166464018 has 128 divisors (see below), whose sum is σ = 452874240. Its totient is φ = 44288640.

The previous prime is 166464007. The next prime is 166464047. The reversal of 166464018 is 810464661.

166464018 is a `hidden beast` number, since 1 + 6 + 6 + 4 + 640 + 1 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 356221 + ... + 356687.

It is an arithmetic number, because the mean of its divisors is an integer number (3538080).

Almost surely, 2^166464018 is an apocalyptic number.

166464018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166464018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226437120).

166464018 is an abundant number, since it is smaller than the sum of its proper divisors (286410222).

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

166464018 is a wasteful number, since it uses less digits than its factorization.

166464018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 166464018 is about 12902.0935510482. The cubic root of 166464018 is about 550.0980739708.

The spelling of 166464018 in words is "one hundred sixty-six million, four hundred sixty-four thousand, eighteen".