72566525 has 6 divisors (see below), whose sum is σ = 89982522. Its totient is φ = 58053200.

The previous prime is 72566467. The next prime is 72566537. The reversal of 72566525 is 52566527.

It can be written as a sum of positive squares in 3 ways, for example, as 10201 + 72556324 = 101^2 + 8518^2 .

It is not a de Polignac number, because 72566525 - 2²⁴ = 55789309 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 5 ways as a sum of consecutive naturals, for example, 1451306 + ... + 1451355.

It is an arithmetic number, because the mean of its divisors is an integer number (14997087).

Almost surely, 2^72566525 is an apocalyptic number.

It is an amenable number.

72566525 is a deficient number, since it is larger than the sum of its proper divisors (17415997).

72566525 is a wasteful number, since it uses less digits than its factorization.

72566525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902671 (or 2902666 counting only the distinct ones).

The product of its digits is 126000, while the sum is 38.

The square root of 72566525 is about 8518.5987697508. The cubic root of 72566525 is about 417.1050443959.

The spelling of 72566525 in words is "seventy-two million, five hundred sixty-six thousand, five hundred twenty-five".