663662426 has 16 divisors (see below), whose sum is σ = 1142433600. Its totient is φ = 283245120.

The previous prime is 663662411. The next prime is 663662431. The reversal of 663662426 is 624266366.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94976 + ... + 101723.

It is an arithmetic number, because the mean of its divisors is an integer number (71402100).

Almost surely, 2^663662426 is an apocalyptic number.

663662426 is a deficient number, since it is larger than the sum of its proper divisors (478771174).

663662426 is a wasteful number, since it uses less digits than its factorization.

663662426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196949.

The product of its digits is 373248, while the sum is 41.

The square root of 663662426 is about 25761.6464147771. The cubic root of 663662426 is about 872.2662656910.

The spelling of 663662426 in words is "six hundred sixty-three million, six hundred sixty-two thousand, four hundred twenty-six".