67771 has 8 divisors (see below), whose sum is σ = 75888. Its totient is φ = 60000.

The previous prime is 67763. The next prime is 67777. The reversal of 67771 is 17776.

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

It is a 5-Lehmer number, since φ(67771) divides (67771-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 67771 - 2³ = 67763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67777) 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, 621 + ... + 721.

It is an arithmetic number, because the mean of its divisors is an integer number (9486).

2⁶⁷⁷⁷¹ is an apocalyptic number.

67771 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

67771 is a deficient number, since it is larger than the sum of its proper divisors (8117).

67771 is a wasteful number, since it uses less digits than its factorization.

67771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173.

The product of its digits is 2058, while the sum is 28.

The square root of 67771 is about 260.3286384553. The cubic root of 67771 is about 40.7706809098.

It can be divided in two parts, 67 and 771, that added together give a palindrome (838).

The spelling of 67771 in words is "sixty-seven thousand, seven hundred seventy-one".