66784982 has 48 divisors (see below), whose sum is σ = 115831296. Its totient is φ = 28828800.

The previous prime is 66784973. The next prime is 66784987. The reversal of 66784982 is 28948766.

It is a self number, because there is not a number n which added to its sum of digits gives 66784982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66784987) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 525803 + ... + 525929.

It is an arithmetic number, because the mean of its divisors is an integer number (2413152).

Almost surely, 2^66784982 is an apocalyptic number.

66784982 is a deficient number, since it is larger than the sum of its proper divisors (49046314).

66784982 is a wasteful number, since it uses less digits than its factorization.

66784982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 234 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The square root of 66784982 is about 8172.2079023970. The cubic root of 66784982 is about 405.7198638604.

The spelling of 66784982 in words is "sixty-six million, seven hundred eighty-four thousand, nine hundred eighty-two".