663522545513 has 4 divisors (see below), whose sum is σ = 663536138820. Its totient is φ = 663508952208.

The previous prime is 663522545471. The next prime is 663522545593. The reversal of 663522545513 is 315545225366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 248415518569 + 415107026944 = 498413^2 + 644288^2 .

It is a cyclic number.

It is not a de Polignac number, because 663522545513 - 2²⁴ = 663505768297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663522545593) 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, 6723170 + ... + 6821147.

It is an arithmetic number, because the mean of its divisors is an integer number (165884034705).

Almost surely, 2^663522545513 is an apocalyptic number.

It is an amenable number.

663522545513 is a deficient number, since it is larger than the sum of its proper divisors (13593307).

663522545513 is a wasteful number, since it uses less digits than its factorization.

663522545513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13593306.

The product of its digits is 3240000, while the sum is 47.

The spelling of 663522545513 in words is "six hundred sixty-three billion, five hundred twenty-two million, five hundred forty-five thousand, five hundred thirteen".