66074816 has 14 divisors (see below), whose sum is σ = 131117340. Its totient is φ = 33037376.

The previous prime is 66074803. The next prime is 66074831. The reversal of 66074816 is 61847066.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 66074816.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516146 + ... + 516273.

Almost surely, 2^66074816 is an apocalyptic number.

It is an amenable number.

66074816 is a deficient number, since it is larger than the sum of its proper divisors (65042524).

66074816 is a wasteful number, since it uses less digits than its factorization.

66074816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032431 (or 1032421 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 66074816 is about 8128.6417069520. The cubic root of 66074816 is about 404.2766461228.

The spelling of 66074816 in words is "sixty-six million, seventy-four thousand, eight hundred sixteen".