426665725 has 6 divisors (see below), whose sum is σ = 529065530. Its totient is φ = 341332560.

The previous prime is 426665717. The next prime is 426665747. The reversal of 426665725 is 527566624.

It can be written as a sum of positive squares in 3 ways, for example, as 62504836 + 364160889 = 7906^2 + 19083^2 .

It is not a de Polignac number, because 426665725 - 2³ = 426665717 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 (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8533290 + ... + 8533339.

Almost surely, 2^426665725 is an apocalyptic number.

It is an amenable number.

426665725 is a deficient number, since it is larger than the sum of its proper divisors (102399805).

426665725 is a wasteful number, since it uses less digits than its factorization.

426665725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17066639 (or 17066634 counting only the distinct ones).

The product of its digits is 604800, while the sum is 43.

The square root of 426665725 is about 20655.8883856396. Note that the first 3 decimals coincide. The cubic root of 426665725 is about 752.8282692655.

The spelling of 426665725 in words is "four hundred twenty-six million, six hundred sixty-five thousand, seven hundred twenty-five".