66784612 has 6 divisors (see below), whose sum is σ = 116873078. Its totient is φ = 33392304.

The previous prime is 66784607. The next prime is 66784643. The reversal of 66784612 is 21648766.

It can be written as a sum of positive squares in only one way, i.e., 61873956 + 4910656 = 7866^2 + 2216^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8348073 + ... + 8348080.

Almost surely, 2^66784612 is an apocalyptic number.

It is an amenable number.

66784612 is a deficient number, since it is larger than the sum of its proper divisors (50088466).

66784612 is a wasteful number, since it uses less digits than its factorization.

66784612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16696157 (or 16696155 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 66784612 is about 8172.1852646645. The cubic root of 66784612 is about 405.7191146070.

The spelling of 66784612 in words is "sixty-six million, seven hundred eighty-four thousand, six hundred twelve".