663522013 has 12 divisors (see below), whose sum is σ = 833516320. Its totient is φ = 517029480.

The previous prime is 663522007. The next prime is 663522023. The reversal of 663522013 is 310225366.

It is a de Polignac number, because none of the positive numbers 2^k-663522013 is a prime.

It is a super-2 number, since 2×663522013² = 880522923471144338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663522023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 390843 + ... + 392536.

Almost surely, 2^663522013 is an apocalyptic number.

It is an amenable number.

663522013 is a deficient number, since it is larger than the sum of its proper divisors (169994307).

663522013 is a wasteful number, since it uses less digits than its factorization.

663522013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783408 (or 783397 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 663522013 is about 25758.9210371863. The cubic root of 663522013 is about 872.2047453773.

Adding to 663522013 its reverse (310225366), we get a palindrome (973747379).

The spelling of 663522013 in words is "six hundred sixty-three million, five hundred twenty-two thousand, thirteen".