66601318 has 16 divisors (see below), whose sum is σ = 114776064. Its totient is φ = 28392840.

The previous prime is 66601279. The next prime is 66601351. The reversal of 66601318 is 81310666.

66601318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 66601318.

It is a congruent number.

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, 9780 + ... + 15127.

It is an arithmetic number, because the mean of its divisors is an integer number (7173504).

Almost surely, 2^66601318 is an apocalyptic number.

66601318 is a deficient number, since it is larger than the sum of its proper divisors (48174746).

66601318 is a wasteful number, since it uses less digits than its factorization.

66601318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25107.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 66601318 is about 8160.9630559144. The cubic root of 66601318 is about 405.3476017948.

The spelling of 66601318 in words is "sixty-six million, six hundred one thousand, three hundred eighteen".