166644672 has 84 divisors (see below), whose sum is σ = 458769720. Its totient is φ = 53322752.

The previous prime is 166644641. The next prime is 166644677. The reversal of 166644672 is 276446661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166644677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 963178 + ... + 963350.

Almost surely, 2^166644672 is an apocalyptic number.

166644672 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 166644672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229384860).

166644672 is an abundant number, since it is smaller than the sum of its proper divisors (292125048).

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

166644672 is an equidigital number, since it uses as much as digits as its factorization.

166644672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 207 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 166644672 is about 12909.0926094749. The cubic root of 166644672 is about 550.2969988211.

The spelling of 166644672 in words is "one hundred sixty-six million, six hundred forty-four thousand, six hundred seventy-two".