6647974 has 8 divisors (see below), whose sum is σ = 9987408. Its totient is φ = 3318840.

The previous prime is 6647959. The next prime is 6647983. The reversal of 6647974 is 4797466.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6647974.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 682 + ... + 3709.

It is an arithmetic number, because the mean of its divisors is an integer number (1248426).

Almost surely, 2^6647974 is an apocalyptic number.

6647974 is a deficient number, since it is larger than the sum of its proper divisors (3339434).

6647974 is a wasteful number, since it uses less digits than its factorization.

6647974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150.

The product of its digits is 254016, while the sum is 43.

The square root of 6647974 is about 2578.3665371704. The cubic root of 6647974 is about 188.0311363851.

The spelling of 6647974 in words is "six million, six hundred forty-seven thousand, nine hundred seventy-four".