663115447 has 8 divisors (see below), whose sum is σ = 739076400. Its totient is φ = 591260544.

The previous prime is 663115441. The next prime is 663115471. The reversal of 663115447 is 744511366.

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

It is a de Polignac number, because none of the positive numbers 2^k-663115447 is a prime.

It is a Duffinian number.

663115447 is a modest number, since divided by 15447 gives 6631 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663115441) 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, 1026172 + ... + 1026817.

It is an arithmetic number, because the mean of its divisors is an integer number (92384550).

Almost surely, 2^663115447 is an apocalyptic number.

663115447 is a deficient number, since it is larger than the sum of its proper divisors (75960953).

663115447 is a wasteful number, since it uses less digits than its factorization.

663115447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053025.

The product of its digits is 60480, while the sum is 37.

The square root of 663115447 is about 25751.0280765642. The cubic root of 663115447 is about 872.0265642772.

The spelling of 663115447 in words is "six hundred sixty-three million, one hundred fifteen thousand, four hundred forty-seven".