663256063 has 4 divisors (see below), whose sum is σ = 665600008. Its totient is φ = 660912120.

The previous prime is 663256049. The next prime is 663256079. The reversal of 663256063 is 360652366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 360652366 = 2 ⋅180326183.

It is a cyclic number.

It is not a de Polignac number, because 663256063 - 2²⁹ = 126385151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660256063) 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, 1171548 + ... + 1172113.

It is an arithmetic number, because the mean of its divisors is an integer number (166400002).

Almost surely, 2^663256063 is an apocalyptic number.

663256063 is a deficient number, since it is larger than the sum of its proper divisors (2343945).

663256063 is a wasteful number, since it uses less digits than its factorization.

663256063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343944.

The product of its (nonzero) digits is 116640, while the sum is 37.

The square root of 663256063 is about 25753.7582305962. The cubic root of 663256063 is about 872.0881987037.

The spelling of 663256063 in words is "six hundred sixty-three million, two hundred fifty-six thousand, sixty-three".