166865328 has 60 divisors (see below), whose sum is σ = 533707408. Its totient is φ = 47675520.

The previous prime is 166865297. The next prime is 166865329. The reversal of 166865328 is 823568661.

It is not an unprimeable number, because it can be changed into a prime (166865329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81763 + ... + 83778.

Almost surely, 2^166865328 is an apocalyptic number.

166865328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

166865328 is an abundant number, since it is smaller than the sum of its proper divisors (366842080).

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

166865328 is a wasteful number, since it uses less digits than its factorization.

166865328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165562 (or 165553 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 166865328 is about 12917.6363162925. The cubic root of 166865328 is about 550.5397764199.

The spelling of 166865328 in words is "one hundred sixty-six million, eight hundred sixty-five thousand, three hundred twenty-eight".