665434850063 has 4 divisors (see below), whose sum is σ = 665526908040. Its totient is φ = 665342792088.

The previous prime is 665434850039. The next prime is 665434850089. The reversal of 665434850063 is 360058434566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 360058434566 = 2 ⋅180029217283.

It is a cyclic number.

It is not a de Polignac number, because 665434850063 - 2¹² = 665434845967 is a prime.

It is a super-2 number, since 2×665434850063² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665434849993 and 665434850020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665439850063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46018145 + ... + 46032602.

It is an arithmetic number, because the mean of its divisors is an integer number (166381727010).

Almost surely, 2^665434850063 is an apocalyptic number.

665434850063 is a deficient number, since it is larger than the sum of its proper divisors (92057977).

665434850063 is an equidigital number, since it uses as much as digits as its factorization.

665434850063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92057976.

The product of its (nonzero) digits is 6220800, while the sum is 50.

The spelling of 665434850063 in words is "six hundred sixty-five billion, four hundred thirty-four million, eight hundred fifty thousand, sixty-three".