663662425 has 12 divisors (see below), whose sum is σ = 824210640. Its totient is φ = 530111120.

The previous prime is 663662411. The next prime is 663662431. The reversal of 663662425 is 524266366.

It is not a de Polignac number, because 663662425 - 2⁷ = 663662297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3667 + ... + 36616.

It is an arithmetic number, because the mean of its divisors is an integer number (68684220).

Almost surely, 2^663662425 is an apocalyptic number.

It is an amenable number.

663662425 is a deficient number, since it is larger than the sum of its proper divisors (160548215).

663662425 is a wasteful number, since it uses less digits than its factorization.

663662425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40952 (or 40947 counting only the distinct ones).

The product of its digits is 311040, while the sum is 40.

The square root of 663662425 is about 25761.6463953684. The cubic root of 663662425 is about 872.2662652529.

The spelling of 663662425 in words is "six hundred sixty-three million, six hundred sixty-two thousand, four hundred twenty-five".