65725587 has 40 divisors (see below), whose sum is σ = 105850800. Its totient is φ = 40490496.

The previous prime is 65725573. The next prime is 65725589. The reversal of 65725587 is 78552756.

65725587 is a `hidden beast` number, since 65 + 7 + 2 + 5 + 587 = 666.

It is not a de Polignac number, because 65725587 - 2¹⁶ = 65660051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65725589) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 80839 + ... + 81647.

It is an arithmetic number, because the mean of its divisors is an integer number (2646270).

Almost surely, 2^65725587 is an apocalyptic number.

65725587 is a deficient number, since it is larger than the sum of its proper divisors (40125213).

65725587 is a wasteful number, since it uses less digits than its factorization.

65725587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 888 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 65725587 is about 8107.1318602820. The cubic root of 65725587 is about 403.5631387771.

It can be divided in two parts, 657 and 25587, that added together give a square (26244 = 162²).

The spelling of 65725587 in words is "sixty-five million, seven hundred twenty-five thousand, five hundred eighty-seven".