299966 has 8 divisors (see below), whose sum is σ = 469584. Its totient is φ = 143440.

The previous prime is 299951. The next prime is 299969. The reversal of 299966 is 669992.

It is a happy number.

299966 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 299966.

It is not an unprimeable number, because it can be changed into a prime (299969) by changing a digit.

299966 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3215 + ... + 3306.

It is an arithmetic number, because the mean of its divisors is an integer number (58698).

2²⁹⁹⁹⁶⁶ is an apocalyptic number.

299966 is a deficient number, since it is larger than the sum of its proper divisors (169618).

299966 is a wasteful number, since it uses less digits than its factorization.

299966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6546.

The product of its digits is 52488, while the sum is 41.

The square root of 299966 is about 547.6915190141. The cubic root of 299966 is about 66.9407659437.

Subtracting from 299966 its sum of digits (41), we obtain a triangular number (299925 = T₇₇₄).

The spelling of 299966 in words is "two hundred ninety-nine thousand, nine hundred sixty-six".