196665 has 16 divisors (see below), whose sum is σ = 359808. Its totient is φ = 89856.

The previous prime is 196663. The next prime is 196681. The reversal of 196665 is 566691.

It is not a de Polignac number, because 196665 - 2¹ = 196663 is a prime.

It is a Curzon number.

196665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (196661) 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, 832 + ... + 1041.

It is an arithmetic number, because the mean of its divisors is an integer number (22488).

2¹⁹⁶⁶⁶⁵ is an apocalyptic number.

196665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

196665 is a deficient number, since it is larger than the sum of its proper divisors (163143).

196665 is a wasteful number, since it uses less digits than its factorization.

196665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888.

The product of its digits is 9720, while the sum is 33.

The square root of 196665 is about 443.4692774026. The cubic root of 196665 is about 58.1534777785.

It can be divided in two parts, 196 and 665, that added together give a triangular number (861 = T₄₁).

The spelling of 196665 in words is "one hundred ninety-six thousand, six hundred sixty-five".