66882578 has 16 divisors (see below), whose sum is σ = 115496064. Its totient is φ = 28453920.

The previous prime is 66882559. The next prime is 66882583. The reversal of 66882578 is 87528866.

66882578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15518 + ... + 19353.

It is an arithmetic number, because the mean of its divisors is an integer number (7218504).

Almost surely, 2^66882578 is an apocalyptic number.

66882578 is a deficient number, since it is larger than the sum of its proper divisors (48613486).

66882578 is a wasteful number, since it uses less digits than its factorization.

66882578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35017.

The product of its digits is 1290240, while the sum is 50.

The square root of 66882578 is about 8178.1769362126. The cubic root of 66882578 is about 405.9174001037.

The spelling of 66882578 in words is "sixty-six million, eight hundred eighty-two thousand, five hundred seventy-eight".