6663147 has 8 divisors (see below), whose sum is σ = 8904000. Its totient is φ = 4432200.

The previous prime is 6663121. The next prime is 6663179. The reversal of 6663147 is 7413666.

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

It is not a de Polignac number, because 6663147 - 2⁸ = 6662891 is a prime.

6663147 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6663347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729 + ... + 3722.

It is an arithmetic number, because the mean of its divisors is an integer number (1113000).

Almost surely, 2^6663147 is an apocalyptic number.

6663147 is a deficient number, since it is larger than the sum of its proper divisors (2240853).

6663147 is a wasteful number, since it uses less digits than its factorization.

6663147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953.

The product of its digits is 18144, while the sum is 33.

The square root of 6663147 is about 2581.3072269685. The cubic root of 6663147 is about 188.1740786143.

It can be divided in two parts, 666 and 3147, that multiplied together give a palindrome (2095902).

The spelling of 6663147 in words is "six million, six hundred sixty-three thousand, one hundred forty-seven".