667799 has 6 divisors (see below), whose sum is σ = 734160.
Its totient is φ = 606980.
The previous prime is 667781. The next prime is 667801. The reversal of 667799 is 997766.
It can be divided in two parts, 6677 and 99, that added together give a palindrome (6776).
It is a de Polignac number, because none of the positive numbers 2k-667799 is a prime.
It is an Ulam number.
It is a Duffinian number.
It is a plaindrome in base 10.
It is a zygodrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (667769) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2639 + ... + 2880.
It is an arithmetic number, because the mean of its divisors is an integer number (122360).
2667799 is an apocalyptic number.
667799 is a deficient number, since it is larger than the sum of its proper divisors (66361).
667799 is a wasteful number, since it uses less digits than its factorization.
667799 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5541 (or 5530 counting only the distinct ones).
The product of its digits is 142884, while the sum is 44.
The square root of 667799 is about 817.1896964598.
The cubic root of 667799 is about 87.4074777118.
The spelling of 667799 in words is "six hundred sixty-seven thousand, seven hundred ninety-nine".