663604247 has 8 divisors (see below), whose sum is σ = 674555376. Its totient is φ = 652684032.

The previous prime is 663604189. The next prime is 663604289. The reversal of 663604247 is 742406366.

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 663604247 - 2¹⁰ = 663603223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663604247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663604297) 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, 37733 + ... + 52449.

It is an arithmetic number, because the mean of its divisors is an integer number (84319422).

Almost surely, 2^663604247 is an apocalyptic number.

663604247 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

663604247 is a deficient number, since it is larger than the sum of its proper divisors (10951129).

663604247 is a wasteful number, since it uses less digits than its factorization.

663604247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15457.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 663604247 is about 25760.5172114226. The cubic root of 663604247 is about 872.2407762955.

It can be divided in two parts, 66360 and 4247, that added together give a palindrome (70607).

The spelling of 663604247 in words is "six hundred sixty-three million, six hundred four thousand, two hundred forty-seven".