65724625 has 16 divisors (see below), whose sum is σ = 82265040. Its totient is φ = 52425600.

The previous prime is 65724613. The next prime is 65724647. The reversal of 65724625 is 52642756.

It can be written as a sum of positive squares in 8 ways, for example, as 1227664 + 64496961 = 1108^2 + 8031^2 .

It is not a de Polignac number, because 65724625 - 2⁷ = 65724497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63109 + ... + 64141.

It is an arithmetic number, because the mean of its divisors is an integer number (5141565).

Almost surely, 2^65724625 is an apocalyptic number.

It is an amenable number.

65724625 is a deficient number, since it is larger than the sum of its proper divisors (16540415).

65724625 is a wasteful number, since it uses less digits than its factorization.

65724625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1547 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The square root of 65724625 is about 8107.0725295880. The cubic root of 65724625 is about 403.5611698350.

The spelling of 65724625 in words is "sixty-five million, seven hundred twenty-four thousand, six hundred twenty-five".