663245641 has 8 divisors (see below), whose sum is σ = 694451520. Its totient is φ = 632237232.

The previous prime is 663245587. The next prime is 663245659. The reversal of 663245641 is 146542366.

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 663245641 - 2¹⁵ = 663212873 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 663245641.

It is not an unprimeable number, because it can be changed into a prime (663245941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42471 + ... + 55948.

It is an arithmetic number, because the mean of its divisors is an integer number (86806440).

Almost surely, 2^663245641 is an apocalyptic number.

It is an amenable number.

663245641 is a deficient number, since it is larger than the sum of its proper divisors (31205879).

663245641 is a wasteful number, since it uses less digits than its factorization.

663245641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98735.

The product of its digits is 103680, while the sum is 37.

The square root of 663245641 is about 25753.5558904008. Note that the first 3 decimals coincide. The cubic root of 663245641 is about 872.0836308597.

The spelling of 663245641 in words is "six hundred sixty-three million, two hundred forty-five thousand, six hundred forty-one".