663531655021241 has 8 divisors (see below), whose sum is σ = 664122296807424. Its totient is φ = 662941239499440.

The previous prime is 663531655021229. The next prime is 663531655021259. The reversal of 663531655021241 is 142120556135366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663531655021241 is a prime.

It is a super-2 number, since 2×663531655021241² (a number of 30 digits) contains 22 as substring.

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 663531655021241.

It is not an unprimeable number, because it can be changed into a prime (663531655021841) 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, 50698115 + ... + 62428856.

It is an arithmetic number, because the mean of its divisors is an integer number (83015287100928).

Almost surely, 2^{663531655021241} is an apocalyptic number.

It is an amenable number.

663531655021241 is a deficient number, since it is larger than the sum of its proper divisors (590641786183).

663531655021241 is a wasteful number, since it uses less digits than its factorization.

663531655021241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113132191.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 663531655021241 in words is "six hundred sixty-three trillion, five hundred thirty-one billion, six hundred fifty-five million, twenty-one thousand, two hundred forty-one".