663556040550433 has 8 divisors (see below), whose sum is σ = 684961651517696. Its totient is φ = 642150465670800.

The previous prime is 663556040550217. The next prime is 663556040550439. The reversal of 663556040550433 is 334055040655366.

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-663556040550433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663556040550439) 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, 31191103 + ... + 47958283.

It is an arithmetic number, because the mean of its divisors is an integer number (85620206439712).

Almost surely, 2^{663556040550433} is an apocalyptic number.

It is an amenable number.

663556040550433 is a deficient number, since it is larger than the sum of its proper divisors (21405610967263).

663556040550433 is a wasteful number, since it uses less digits than its factorization.

663556040550433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18043815.

The product of its (nonzero) digits is 58320000, while the sum is 55.

The spelling of 663556040550433 in words is "six hundred sixty-three trillion, five hundred fifty-six billion, forty million, five hundred fifty thousand, four hundred thirty-three".