299661 has 8 divisors (see below), whose sum is σ = 406560. Its totient is φ = 196272.

The previous prime is 299653. The next prime is 299671. The reversal of 299661 is 166992.

It is a happy number.

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

It is not a de Polignac number, because 299661 - 2³ = 299653 is a prime.

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 299661.

It is not an unprimeable number, because it can be changed into a prime (299671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (50820).

2²⁹⁹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

299661 is a deficient number, since it is larger than the sum of its proper divisors (106899).

299661 is a wasteful number, since it uses less digits than its factorization.

299661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755.

The product of its digits is 5832, while the sum is 33.

The square root of 299661 is about 547.4130067874. The cubic root of 299661 is about 66.9180701967.

The spelling of 299661 in words is "two hundred ninety-nine thousand, six hundred sixty-one".