66887318 has 16 divisors (see below), whose sum is σ = 103151664.
Its totient is φ = 32509440.
The previous prime is 66887309. The next prime is 66887329. The reversal of 66887318 is 81378866.
It is a Curzon number.
It is a congruent number.
It is an unprimeable number.
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, 23846 + ... + 26502.
It is an arithmetic number, because the mean of its divisors is an integer number (6446979).
Almost surely, 266887318 is an apocalyptic number.
66887318 is a deficient number, since it is larger than the sum of its proper divisors (36264346).
66887318 is a wasteful number, since it uses less digits than its factorization.
66887318 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3007.
The product of its digits is 387072, while the sum is 47.
The square root of 66887318 is about 8178.4667267160.
The cubic root of 66887318 is about 405.9269890633.
The spelling of 66887318 in words is "sixty-six million, eight hundred eighty-seven thousand, three hundred eighteen".