663199 has 4 divisors (see below), whose sum is σ = 667800. Its totient is φ = 658600.

The previous prime is 663191. The next prime is 663203. The reversal of 663199 is 991366.

663199 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 663199 - 2³ = 663191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2077 + ... + 2374.

It is an arithmetic number, because the mean of its divisors is an integer number (166950).

2⁶⁶³¹⁹⁹ is an apocalyptic number.

663199 is a deficient number, since it is larger than the sum of its proper divisors (4601).

663199 is a wasteful number, since it uses less digits than its factorization.

663199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600.

The product of its digits is 8748, while the sum is 34.

The square root of 663199 is about 814.3703088890. The cubic root of 663199 is about 87.2063188054.

The spelling of 663199 in words is "six hundred sixty-three thousand, one hundred ninety-nine".