663151431925 has 18 divisors (see below), whose sum is σ = 849689542914. Its totient is φ = 513407541600.

The previous prime is 663151431907. The next prime is 663151431931. The reversal of 663151431925 is 529134151366.

It can be written as a sum of positive squares in 3 ways, for example, as 100630431729 + 562521000196 = 317223^2 + 750014^2 .

It is not a de Polignac number, because 663151431925 - 2¹⁹ = 663150907637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13777254 + ... + 13825303.

Almost surely, 2^663151431925 is an apocalyptic number.

It is an amenable number.

663151431925 is a deficient number, since it is larger than the sum of its proper divisors (186538110989).

663151431925 is a wasteful number, since it uses less digits than its factorization.

663151431925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27602629 (or 27602593 counting only the distinct ones).

The product of its digits is 583200, while the sum is 46.

The spelling of 663151431925 in words is "six hundred sixty-three billion, one hundred fifty-one million, four hundred thirty-one thousand, nine hundred twenty-five".