65625261 has 16 divisors (see below), whose sum is σ = 94569216. Its totient is φ = 40239936.

The previous prime is 65625257. The next prime is 65625269. The reversal of 65625261 is 16252656.

It is a happy number.

It is not a de Polignac number, because 65625261 - 2² = 65625257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65625269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8556 + ... + 14298.

It is an arithmetic number, because the mean of its divisors is an integer number (5910576).

Almost surely, 2^65625261 is an apocalyptic number.

It is an amenable number.

65625261 is a deficient number, since it is larger than the sum of its proper divisors (28943955).

65625261 is a wasteful number, since it uses less digits than its factorization.

65625261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052.

The product of its digits is 21600, while the sum is 33.

The square root of 65625261 is about 8100.9419822635. The cubic root of 65625261 is about 403.3576962418.

The spelling of 65625261 in words is "sixty-five million, six hundred twenty-five thousand, two hundred sixty-one".