65705565 has 16 divisors (see below), whose sum is σ = 105412608. Its totient is φ = 34948416.

The previous prime is 65705557. The next prime is 65705567. The reversal of 65705565 is 56550756.

It is not a de Polignac number, because 65705565 - 2³ = 65705557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65705567) 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, 27 + ... + 11463.

It is an arithmetic number, because the mean of its divisors is an integer number (6588288).

Almost surely, 2^65705565 is an apocalyptic number.

It is an amenable number.

65705565 is a deficient number, since it is larger than the sum of its proper divisors (39707043).

65705565 is a wasteful number, since it uses less digits than its factorization.

65705565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11828.

The product of its (nonzero) digits is 157500, while the sum is 39.

The square root of 65705565 is about 8105.8969275460. The cubic root of 65705565 is about 403.5221554394.

The spelling of 65705565 in words is "sixty-five million, seven hundred five thousand, five hundred sixty-five".