190665 has 24 divisors (see below), whose sum is σ = 349440. Its totient is φ = 95904.

The previous prime is 190657. The next prime is 190667. The reversal of 190665 is 566091.

190665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 190665 - 2³ = 190657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 744 + ... + 966.

It is an arithmetic number, because the mean of its divisors is an integer number (14560).

2¹⁹⁰⁶⁶⁵ is an apocalyptic number.

190665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190665 is a deficient number, since it is larger than the sum of its proper divisors (158775).

190665 is a wasteful number, since it uses less digits than its factorization.

190665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 190665 is about 436.6520353783. The cubic root of 190665 is about 57.5559631583. Note that the first 3 decimals are identical.

The spelling of 190665 in words is "one hundred ninety thousand, six hundred sixty-five".