665433356663 has 8 divisors (see below), whose sum is σ = 681825015168. Its totient is φ = 649083355704.

The previous prime is 665433356647. The next prime is 665433356683. The reversal of 665433356663 is 366653334566.

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 665433356663 - 2⁴ = 665433356647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665433356599 and 665433356608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665433356683) 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, 10382045 + ... + 10445942.

It is an arithmetic number, because the mean of its divisors is an integer number (85228126896).

Almost surely, 2^665433356663 is an apocalyptic number.

665433356663 is a deficient number, since it is larger than the sum of its proper divisors (16391658505).

665433356663 is a wasteful number, since it uses less digits than its factorization.

665433356663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20828773.

The product of its digits is 62985600, while the sum is 56.

The spelling of 665433356663 in words is "six hundred sixty-five billion, four hundred thirty-three million, three hundred fifty-six thousand, six hundred sixty-three".