665563305053 has 4 divisors (see below), whose sum is σ = 665569779840. Its totient is φ = 665556830268.

The previous prime is 665563305041. The next prime is 665563305073. The reversal of 665563305053 is 350503365566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 665563305053 - 2¹⁴ = 665563288669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665563304989 and 665563305007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665563305013) 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, 3080675 + ... + 3289632.

It is an arithmetic number, because the mean of its divisors is an integer number (166392444960).

Almost surely, 2^665563305053 is an apocalyptic number.

It is an amenable number.

665563305053 is a deficient number, since it is larger than the sum of its proper divisors (6474787).

665563305053 is a wasteful number, since it uses less digits than its factorization.

665563305053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474786.

The product of its (nonzero) digits is 3645000, while the sum is 47.

The spelling of 665563305053 in words is "six hundred sixty-five billion, five hundred sixty-three million, three hundred five thousand, fifty-three".