663012525 has 24 divisors (see below), whose sum is σ = 1252778944. Its totient is φ = 303091200.

The previous prime is 663012491. The next prime is 663012527. The reversal of 663012525 is 525210366.

It is not a de Polignac number, because 663012525 - 2⁸ = 663012269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663012492 and 663012501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663012527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 630916 + ... + 631965.

Almost surely, 2^663012525 is an apocalyptic number.

It is an amenable number.

663012525 is a deficient number, since it is larger than the sum of its proper divisors (589766419).

663012525 is a wasteful number, since it uses less digits than its factorization.

663012525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262901 (or 1262896 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 663012525 is about 25749.0295933653. The cubic root of 663012525 is about 871.9814462603.

The spelling of 663012525 in words is "six hundred sixty-three million, twelve thousand, five hundred twenty-five".