4065659725 has 12 divisors (see below), whose sum is σ = 5057331444. Its totient is φ = 3242261120.

The previous prime is 4065659711. The next prime is 4065659747. The reversal of 4065659725 is 5279565604.

4065659725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 9753129 + 4055906596 = 3123^2 + 63686^2 .

It is not a de Polignac number, because 4065659725 - 2¹³ = 4065651533 is a prime.

It is a Duffinian number.

It is a congruent 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, 248584 + ... + 264433.

It is an arithmetic number, because the mean of its divisors is an integer number (421444287).

Almost surely, 2^4065659725 is an apocalyptic number.

It is an amenable number.

4065659725 is a deficient number, since it is larger than the sum of its proper divisors (991671719).

4065659725 is a wasteful number, since it uses less digits than its factorization.

4065659725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513344 (or 513339 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 49.

The square root of 4065659725 is about 63762.5260243036. The cubic root of 4065659725 is about 1596.0396487084.

The spelling of 4065659725 in words is "four billion, sixty-five million, six hundred fifty-nine thousand, seven hundred twenty-five".