663145647 has 8 divisors (see below), whose sum is σ = 886357680. Its totient is φ = 441015360.

The previous prime is 663145633. The next prime is 663145649. The reversal of 663145647 is 746541366.

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

It is not a de Polignac number, because 663145647 - 2⁴ = 663145631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663145599 and 663145608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663145649) 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, 269004 + ... + 271457.

It is an arithmetic number, because the mean of its divisors is an integer number (110794710).

Almost surely, 2^663145647 is an apocalyptic number.

663145647 is a deficient number, since it is larger than the sum of its proper divisors (223212033).

663145647 is a wasteful number, since it uses less digits than its factorization.

663145647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540873.

The product of its digits is 362880, while the sum is 42.

The square root of 663145647 is about 25751.6144542434. The cubic root of 663145647 is about 872.0398021945.

The spelling of 663145647 in words is "six hundred sixty-three million, one hundred forty-five thousand, six hundred forty-seven".