663498613 has 8 divisors (see below), whose sum is σ = 680434776. Its totient is φ = 646598400.

The previous prime is 663498607. The next prime is 663498631. The reversal of 663498613 is 316894366.

It can be written as a sum of positive squares in 4 ways, for example, as 96963409 + 566535204 = 9847^2 + 23802^2 .

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 663498613 - 2⁵ = 663498581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663498683) 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, 30583 + ... + 47563.

It is an arithmetic number, because the mean of its divisors is an integer number (85054347).

Almost surely, 2^663498613 is an apocalyptic number.

It is an amenable number.

663498613 is a deficient number, since it is larger than the sum of its proper divisors (16936163).

663498613 is a wasteful number, since it uses less digits than its factorization.

663498613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17975.

The product of its digits is 559872, while the sum is 46.

The square root of 663498613 is about 25758.4668216103. The cubic root of 663498613 is about 872.1944920973.

The spelling of 663498613 in words is "six hundred sixty-three million, four hundred ninety-eight thousand, six hundred thirteen".