6699559 has 4 divisors (see below), whose sum is σ = 6727600. Its totient is φ = 6671520.

The previous prime is 6699541. The next prime is 6699577. The reversal of 6699559 is 9559966.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (6699541) and next prime (6699577).

It is a cyclic number.

It is not a de Polignac number, because 6699559 - 2¹¹ = 6697511 is a prime.

It is a Duffinian number.

6699559 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699599) 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, 13659 + ... + 14140.

It is an arithmetic number, because the mean of its divisors is an integer number (1681900).

Almost surely, 2^6699559 is an apocalyptic number.

6699559 is a deficient number, since it is larger than the sum of its proper divisors (28041).

6699559 is a wasteful number, since it uses less digits than its factorization.

6699559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28040.

The product of its digits is 656100, while the sum is 49.

The square root of 6699559 is about 2588.3506331253. The cubic root of 6699559 is about 188.5162268183.

The spelling of 6699559 in words is "six million, six hundred ninety-nine thousand, five hundred fifty-nine".