166506844 has 24 divisors (see below), whose sum is σ = 347493888. Its totient is φ = 68257200.

The previous prime is 166506841. The next prime is 166506869. The reversal of 166506844 is 448605661.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 166506797 and 166506806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166506841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128632 + ... + 129919.

It is an arithmetic number, because the mean of its divisors is an integer number (14478912).

Almost surely, 2^166506844 is an apocalyptic number.

166506844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166506844 is an abundant number, since it is smaller than the sum of its proper divisors (180987044).

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

166506844 is a wasteful number, since it uses less digits than its factorization.

166506844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258585 (or 258583 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 166506844 is about 12903.7530974519. The cubic root of 166506844 is about 550.1452442851.

The spelling of 166506844 in words is "one hundred sixty-six million, five hundred six thousand, eight hundred forty-four".