6660799 has 2 divisors, whose sum is σ = 6660800. Its totient is φ = 6660798.

The previous prime is 6660791. The next prime is 6660809. The reversal of 6660799 is 9970666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6660799 - 2³ = 6660791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6660791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330399 + 3330400.

It is an arithmetic number, because the mean of its divisors is an integer number (3330400).

Almost surely, 2^6660799 is an apocalyptic number.

6660799 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660799 is an equidigital number, since it uses as much as digits as its factorization.

6660799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 6660799 is about 2580.8523785757. The cubic root of 6660799 is about 188.1519727112.

The spelling of 6660799 in words is "six million, six hundred sixty thousand, seven hundred ninety-nine".