66769216 has 28 divisors (see below), whose sum is σ = 132770880. Its totient is φ = 33315200.

The previous prime is 66769193. The next prime is 66769237. The reversal of 66769216 is 61296766.

66769216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 45291 + ... + 46741.

Almost surely, 2^66769216 is an apocalyptic number.

It is an amenable number.

66769216 is a deficient number, since it is larger than the sum of its proper divisors (66001664).

66769216 is a wasteful number, since it uses less digits than its factorization.

66769216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182 (or 2172 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 66769216 is about 8171.2432346614. The cubic root of 66769216 is about 405.6879351114.

The spelling of 66769216 in words is "sixty-six million, seven hundred sixty-nine thousand, two hundred sixteen".