76811 has 4 divisors (see below), whose sum is σ = 87792. Its totient is φ = 65832.

The previous prime is 76801. The next prime is 76819. The reversal of 76811 is 11867.

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

It is a cyclic number.

It is not a de Polignac number, because 76811 - 2¹⁰ = 75787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76819) 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, 5480 + ... + 5493.

It is an arithmetic number, because the mean of its divisors is an integer number (21948).

2⁷⁶⁸¹¹ is an apocalyptic number.

76811 is a deficient number, since it is larger than the sum of its proper divisors (10981).

76811 is a wasteful number, since it uses less digits than its factorization.

76811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10980.

The product of its digits is 336, while the sum is 23.

The square root of 76811 is about 277.1479749159. The cubic root of 76811 is about 42.5083720531.

It can be divided in two parts, 768 and 11, that multiplied together give a palindrome (8448).

The spelling of 76811 in words is "seventy-six thousand, eight hundred eleven".