663251425 has 12 divisors (see below), whose sum is σ = 834708976. Its totient is φ = 522680400.

The previous prime is 663251419. The next prime is 663251443. The reversal of 663251425 is 524152366.

It is not a de Polignac number, because 663251425 - 2²⁷ = 529033697 is a prime.

It is a Duffinian number.

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, 196311 + ... + 199660.

Almost surely, 2^663251425 is an apocalyptic number.

It is an amenable number.

663251425 is a deficient number, since it is larger than the sum of its proper divisors (171457551).

663251425 is a wasteful number, since it uses less digits than its factorization.

663251425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396048 (or 396043 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 663251425 is about 25753.6681853285. The cubic root of 663251425 is about 872.0861659270.

The spelling of 663251425 in words is "six hundred sixty-three million, two hundred fifty-one thousand, four hundred twenty-five".