66928068 has 36 divisors (see below), whose sum is σ = 176537088. Its totient is φ = 21339120.

The previous prime is 66928063. The next prime is 66928073. The reversal of 66928068 is 86082966.

It is an interprime number because it is at equal distance from previous prime (66928063) and next prime (66928073).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (66928063) 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 11 ways as a sum of consecutive naturals, for example, 39588 + ... + 41243.

It is an arithmetic number, because the mean of its divisors is an integer number (4903808).

Almost surely, 2^66928068 is an apocalyptic number.

It is an amenable number.

66928068 is an abundant number, since it is smaller than the sum of its proper divisors (109609020).

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

66928068 is a wasteful number, since it uses less digits than its factorization.

66928068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80864 (or 80859 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 66928068 is about 8180.9576456549. The cubic root of 66928068 is about 406.0094071121.

The spelling of 66928068 in words is "sixty-six million, nine hundred twenty-eight thousand, sixty-eight".