16779 has 16 divisors (see below), whose sum is σ = 27648. Its totient is φ = 8832.

The previous prime is 16763. The next prime is 16787. The reversal of 16779 is 97761.

It is not a de Polignac number, because 16779 - 2⁴ = 16763 is a prime.

It is a plaindrome in base 10.

It is a nialpdrome in base 7 and base 12.

It is not an unprimeable number, because it can be changed into a prime (16729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334 + ... + 380.

It is an arithmetic number, because the mean of its divisors is an integer number (1728).

2¹⁶⁷⁷⁹ is an apocalyptic number.

16779 is a deficient number, since it is larger than the sum of its proper divisors (10869).

16779 is a wasteful number, since it uses less digits than its factorization.

16779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74.

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

The square root of 16779 is about 129.5337793782. The cubic root of 16779 is about 25.6009073572.

The spelling of 16779 in words is "sixteen thousand, seven hundred seventy-nine".