65805625 has 20 divisors (see below), whose sum is σ = 82786000. Its totient is φ = 52290000.

The previous prime is 65805583. The next prime is 65805629. The reversal of 65805625 is 52650856.

It is not a de Polignac number, because 65805625 - 2⁷ = 65805497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65805629) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 131626 + ... + 132124.

It is an arithmetic number, because the mean of its divisors is an integer number (4139300).

Almost surely, 2^65805625 is an apocalyptic number.

It is an amenable number.

65805625 is a deficient number, since it is larger than the sum of its proper divisors (16980375).

65805625 is an equidigital number, since it uses as much as digits as its factorization.

65805625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 65805625 is about 8112.0666294108. The cubic root of 65805625 is about 403.7268866946.

It can be divided in two parts, 65805 and 625, that added together give a triangular number (66430 = T₃₆₄).

The spelling of 65805625 in words is "sixty-five million, eight hundred five thousand, six hundred twenty-five".