663144501 has 4 divisors (see below), whose sum is σ = 884192672. Its totient is φ = 442096332.

The previous prime is 663144499. The next prime is 663144511. The reversal of 663144501 is 105441366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 663144501 - 2¹ = 663144499 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 (663144511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110524081 + ... + 110524086.

It is an arithmetic number, because the mean of its divisors is an integer number (221048168).

Almost surely, 2^663144501 is an apocalyptic number.

It is an amenable number.

663144501 is a deficient number, since it is larger than the sum of its proper divisors (221048171).

663144501 is a wasteful number, since it uses less digits than its factorization.

663144501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221048170.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 663144501 is about 25751.5922032017. The cubic root of 663144501 is about 872.0392998623.

Adding to 663144501 its reverse (105441366), we get a palindrome (768585867).

The spelling of 663144501 in words is "six hundred sixty-three million, one hundred forty-four thousand, five hundred one".