663450342551 has 8 divisors (see below), whose sum is σ = 686616264000. Its totient is φ = 640303642720.

The previous prime is 663450342521. The next prime is 663450342589. The reversal of 663450342551 is 155243054366.

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 663450342551 - 2⁶ = 663450342487 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 (663450342521) 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, 4735151 + ... + 4873248.

It is an arithmetic number, because the mean of its divisors is an integer number (85827033000).

Almost surely, 2^663450342551 is an apocalyptic number.

663450342551 is a deficient number, since it is larger than the sum of its proper divisors (23165921449).

663450342551 is a wasteful number, since it uses less digits than its factorization.

663450342551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9610809.

The product of its (nonzero) digits is 1296000, while the sum is 44.

It can be divided in two parts, 663450 and 342551, that added together give a palindrome (1006001).

The spelling of 663450342551 in words is "six hundred sixty-three billion, four hundred fifty million, three hundred forty-two thousand, five hundred fifty-one".