65561025 has 48 divisors (see below), whose sum is σ = 114903360. Its totient is φ = 32928000.

The previous prime is 65561011. The next prime is 65561033. The reversal of 65561025 is 52016556.

It is not a de Polignac number, because 65561025 - 2⁷ = 65560897 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65560983 and 65561001.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93175 + ... + 93875.

It is an arithmetic number, because the mean of its divisors is an integer number (2393820).

Almost surely, 2^65561025 is an apocalyptic number.

It is an amenable number.

65561025 is a deficient number, since it is larger than the sum of its proper divisors (49342335).

65561025 is a wasteful number, since it uses less digits than its factorization.

65561025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 781 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 65561025 is about 8096.9762874792. The cubic root of 65561025 is about 403.2260470209.

The spelling of 65561025 in words is "sixty-five million, five hundred sixty-one thousand, twenty-five".