66928170 has 16 divisors (see below), whose sum is σ = 160627680. Its totient is φ = 17847504.

The previous prime is 66928159. The next prime is 66928171. The reversal of 66928170 is 7182966.

It is not an unprimeable number, because it can be changed into a prime (66928171) 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 7 ways as a sum of consecutive naturals, for example, 1115440 + ... + 1115499.

It is an arithmetic number, because the mean of its divisors is an integer number (10039230).

Almost surely, 2^66928170 is an apocalyptic number.

66928170 is an abundant number, since it is smaller than the sum of its proper divisors (93699510).

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

66928170 is a wasteful number, since it uses less digits than its factorization.

66928170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230949.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 66928170 is about 8180.9638796416. The cubic root of 66928170 is about 406.0096133681.

The spelling of 66928170 in words is "sixty-six million, nine hundred twenty-eight thousand, one hundred seventy".