166964128 has 48 divisors (see below), whose sum is σ = 341863200. Its totient is φ = 80199936.

The previous prime is 166964117. The next prime is 166964143. The reversal of 166964128 is 821469661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97423 + ... + 99121.

It is an arithmetic number, because the mean of its divisors is an integer number (7122150).

Almost surely, 2^166964128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166964128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170931600).

166964128 is an abundant number, since it is smaller than the sum of its proper divisors (174899072).

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

166964128 is a wasteful number, since it uses less digits than its factorization.

166964128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829 (or 1821 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 166964128 is about 12921.4599794296. The cubic root of 166964128 is about 550.6484121259.

The spelling of 166964128 in words is "one hundred sixty-six million, nine hundred sixty-four thousand, one hundred twenty-eight".