67791 has 8 divisors (see below), whose sum is σ = 92160. Its totient is φ = 44312.

The previous prime is 67789. The next prime is 67801. The reversal of 67791 is 19776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67791 - 2¹ = 67789 is a prime.

67791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15 + ... + 368.

It is an arithmetic number, because the mean of its divisors is an integer number (11520).

2⁶⁷⁷⁹¹ is an apocalyptic number.

67791 is a deficient number, since it is larger than the sum of its proper divisors (24369).

67791 is a wasteful number, since it uses less digits than its factorization.

67791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445.

The product of its digits is 2646, while the sum is 30.

The square root of 67791 is about 260.3670486064. The cubic root of 67791 is about 40.7746911473.

It can be divided in two parts, 67 and 791, that added together give a palindrome (858).

The spelling of 67791 in words is "sixty-seven thousand, seven hundred ninety-one".