66718028 has 48 divisors (see below), whose sum is σ = 129360000. Its totient is φ = 29922048.

The previous prime is 66718021. The next prime is 66718033. The reversal of 66718028 is 82081766.

66718028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66717982 and 66718000.

It is not an unprimeable number, because it can be changed into a prime (66718021) 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 15 ways as a sum of consecutive naturals, for example, 447698 + ... + 447846.

It is an arithmetic number, because the mean of its divisors is an integer number (2695000).

Almost surely, 2^66718028 is an apocalyptic number.

It is an amenable number.

66718028 is a deficient number, since it is larger than the sum of its proper divisors (62641972).

66718028 is a wasteful number, since it uses less digits than its factorization.

66718028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 66718028 is about 8168.1104302035. The cubic root of 66718028 is about 405.5842363098.

The spelling of 66718028 in words is "sixty-six million, seven hundred eighteen thousand, twenty-eight".