65775 has 12 divisors (see below), whose sum is σ = 108872. Its totient is φ = 35040.

The previous prime is 65761. The next prime is 65777. The reversal of 65775 is 57756.

It is not a de Polignac number, because 65775 - 2⁷ = 65647 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 364 + ... + 513.

2⁶⁵⁷⁷⁵ is an apocalyptic number.

65775 is a deficient number, since it is larger than the sum of its proper divisors (43097).

65775 is a wasteful number, since it uses less digits than its factorization.

65775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 885 counting only the distinct ones).

The product of its digits is 7350, while the sum is 30.

The square root of 65775 is about 256.4663720646. The cubic root of 65775 is about 40.3664247397.

The spelling of 65775 in words is "sixty-five thousand, seven hundred seventy-five".