6667799 has 4 divisors (see below), whose sum is σ = 6674736. Its totient is φ = 6660864.

The previous prime is 6667781. The next prime is 6667813. The reversal of 6667799 is 9977666.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9977666 = 2 ⋅4988833.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6667799 is a prime.

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 (6667729) 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, 1739 + ... + 4044.

It is an arithmetic number, because the mean of its divisors is an integer number (1668684).

Almost surely, 2^6667799 is an apocalyptic number.

6667799 is a deficient number, since it is larger than the sum of its proper divisors (6937).

6667799 is a wasteful number, since it uses less digits than its factorization.

6667799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6936.

The product of its digits is 857304, while the sum is 50.

The square root of 6667799 is about 2582.2081635685. The cubic root of 6667799 is about 188.2178608376.

The spelling of 6667799 in words is "six million, six hundred sixty-seven thousand, seven hundred ninety-nine".