6698978 has 32 divisors (see below), whose sum is σ = 12035520. Its totient is φ = 2756160.

The previous prime is 6698977. The next prime is 6698981. The reversal of 6698978 is 8798966.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6698977) 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 15 ways as a sum of consecutive naturals, for example, 16676 + ... + 17072.

It is an arithmetic number, because the mean of its divisors is an integer number (376110).

Almost surely, 2^6698978 is an apocalyptic number.

6698978 is a deficient number, since it is larger than the sum of its proper divisors (5336542).

6698978 is a wasteful number, since it uses less digits than its factorization.

6698978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482.

The product of its digits is 1306368, while the sum is 53.

The square root of 6698978 is about 2588.2383970570. The cubic root of 6698978 is about 188.5107771514.

The spelling of 6698978 in words is "six million, six hundred ninety-eight thousand, nine hundred seventy-eight".