663541263241 has 8 divisors (see below), whose sum is σ = 665033075784. Its totient is φ = 662049678720.

The previous prime is 663541263223. The next prime is 663541263257. The reversal of 663541263241 is 142362145366.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33694273600 + 629846989641 = 183560^2 + 793629^2 .

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 663541263241 - 2¹¹ = 663541261193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663541263271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6652051 + ... + 6751063.

It is an arithmetic number, because the mean of its divisors is an integer number (83129134473).

Almost surely, 2^663541263241 is an apocalyptic number.

It is an amenable number.

663541263241 is a deficient number, since it is larger than the sum of its proper divisors (1491812543).

663541263241 is a wasteful number, since it uses less digits than its factorization.

663541263241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114011.

The product of its digits is 622080, while the sum is 43.

The spelling of 663541263241 in words is "six hundred sixty-three billion, five hundred forty-one million, two hundred sixty-three thousand, two hundred forty-one".