166442864 has 20 divisors (see below), whose sum is σ = 368552304. Its totient is φ = 71332608.

The previous prime is 166442863. The next prime is 166442867. The reversal of 166442864 is 468244661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166442863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742937 + ... + 743160.

Almost surely, 2^166442864 is an apocalyptic number.

166442864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166442864 is an abundant number, since it is smaller than the sum of its proper divisors (202109440).

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

166442864 is a wasteful number, since it uses less digits than its factorization.

166442864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486112 (or 1486106 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 166442864 is about 12901.2737355658. The cubic root of 166442864 is about 550.0747711018.

The spelling of 166442864 in words is "one hundred sixty-six million, four hundred forty-two thousand, eight hundred sixty-four".