67779 has 12 divisors (see below), whose sum is σ = 103896. Its totient is φ = 42432.

The previous prime is 67777. The next prime is 67783. The reversal of 67779 is 97776.

It is not a de Polignac number, because 67779 - 2¹ = 67777 is a prime.

It is a plaindrome in base 10.

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 11 ways as a sum of consecutive naturals, for example, 69 + ... + 374.

It is an arithmetic number, because the mean of its divisors is an integer number (8658).

2⁶⁷⁷⁷⁹ is an apocalyptic number.

67779 is a deficient number, since it is larger than the sum of its proper divisors (36117).

67779 is a wasteful number, since it uses less digits than its factorization.

67779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 463 counting only the distinct ones).

The product of its digits is 18522, while the sum is 36.

The square root of 67779 is about 260.3440031958. The cubic root of 67779 is about 40.7722850995.

It can be divided in two parts, 6777 and 9, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 67779 in words is "sixty-seven thousand, seven hundred seventy-nine".