663303553525331 has 4 divisors (see below), whose sum is σ = 663303617563200. Its totient is φ = 663303489487464.

The previous prime is 663303553525289. The next prime is 663303553525373. The reversal of 663303553525331 is 133525355303366.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (663303553525289) and next prime (663303553525373).

It is a cyclic number.

It is not a de Polignac number, because 663303553525331 - 2³⁴ = 663286373656147 is a prime.

It is a super-2 number, since 2×663303553525331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663303553575331) 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, 12526376 + ... + 38516453.

It is an arithmetic number, because the mean of its divisors is an integer number (165825904390800).

Almost surely, 2^{663303553525331} is an apocalyptic number.

663303553525331 is a deficient number, since it is larger than the sum of its proper divisors (64037869).

663303553525331 is a wasteful number, since it uses less digits than its factorization.

663303553525331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64037868.

The product of its (nonzero) digits is 32805000, while the sum is 53.

The spelling of 663303553525331 in words is "six hundred sixty-three trillion, three hundred three billion, five hundred fifty-three million, five hundred twenty-five thousand, three hundred thirty-one".