67765 has 4 divisors (see below), whose sum is σ = 81324. Its totient is φ = 54208.

The previous prime is 67763. The next prime is 67777. The reversal of 67765 is 56776.

67765 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39204 + 28561 = 198^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 67765 - 2¹ = 67763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6772 + ... + 6781.

It is an arithmetic number, because the mean of its divisors is an integer number (20331).

2⁶⁷⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

67765 is a deficient number, since it is larger than the sum of its proper divisors (13559).

67765 is a wasteful number, since it uses less digits than its factorization.

67765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13558.

The product of its digits is 8820, while the sum is 31.

The square root of 67765 is about 260.3171143048. The cubic root of 67765 is about 40.7694776847.

The spelling of 67765 in words is "sixty-seven thousand, seven hundred sixty-five".