6607978 has 16 divisors (see below), whose sum is σ = 10964520. Its totient is φ = 2966976.

The previous prime is 6607967. The next prime is 6607981. The reversal of 6607978 is 8797066.

It can be written as a sum of positive squares in 4 ways, for example, as 3908529 + 2699449 = 1977^2 + 1643^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 2473 + ... + 4396.

Almost surely, 2^6607978 is an apocalyptic number.

6607978 is a deficient number, since it is larger than the sum of its proper divisors (4356542).

6607978 is a wasteful number, since it uses less digits than its factorization.

6607978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6921.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 6607978 is about 2570.5987629344. The cubic root of 6607978 is about 187.6532956719.

It can be divided in two parts, 6607 and 978, that multiplied together give a palindrome (6461646).

The spelling of 6607978 in words is "six million, six hundred seven thousand, nine hundred seventy-eight".