166844664 has 128 divisors (see below), whose sum is σ = 560908800. Its totient is φ = 44858880.

The previous prime is 166844617. The next prime is 166844683. The reversal of 166844664 is 466448661.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22459 + ... + 28949.

It is an arithmetic number, because the mean of its divisors is an integer number (4382100).

Almost surely, 2^166844664 is an apocalyptic number.

166844664 is a gapful number since it is divisible by the number (14) 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 166844664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280454400).

166844664 is an abundant number, since it is smaller than the sum of its proper divisors (394064136).

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

166844664 is a wasteful number, since it uses less digits than its factorization.

166844664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530 (or 6520 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 166844664 is about 12916.8364547981. The cubic root of 166844664 is about 550.5170498621.

The spelling of 166844664 in words is "one hundred sixty-six million, eight hundred forty-four thousand, six hundred sixty-four".