662216978 has 8 divisors (see below), whose sum is σ = 1025368320. Its totient is φ = 320427540.

The previous prime is 662216977. The next prime is 662216983. The reversal of 662216978 is 879612266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (662216977) by changing a digit.

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, 5340398 + ... + 5340521.

It is an arithmetic number, because the mean of its divisors is an integer number (128171040).

Almost surely, 2^662216978 is an apocalyptic number.

662216978 is a deficient number, since it is larger than the sum of its proper divisors (363151342).

662216978 is a wasteful number, since it uses less digits than its factorization.

662216978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10680952.

The product of its digits is 435456, while the sum is 47.

The square root of 662216978 is about 25733.5768598149. The cubic root of 662216978 is about 871.6325439194.

The spelling of 662216978 in words is "six hundred sixty-two million, two hundred sixteen thousand, nine hundred seventy-eight".