663255647 has 8 divisors (see below), whose sum is σ = 685450080. Its totient is φ = 641347840.

The previous prime is 663255643. The next prime is 663255653. The reversal of 663255647 is 746552366.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 663255647 - 2² = 663255643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663255598 and 663255607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663255643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66947 + ... + 76212.

It is an arithmetic number, because the mean of its divisors is an integer number (85681260).

Almost surely, 2^663255647 is an apocalyptic number.

663255647 is a deficient number, since it is larger than the sum of its proper divisors (22194433).

663255647 is a wasteful number, since it uses less digits than its factorization.

663255647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143313.

The product of its digits is 907200, while the sum is 44.

The square root of 663255647 is about 25753.7501541038. The cubic root of 663255647 is about 872.0880163766.

The spelling of 663255647 in words is "six hundred sixty-three million, two hundred fifty-five thousand, six hundred forty-seven".