6699689 has 4 divisors (see below), whose sum is σ = 6915840. Its totient is φ = 6483540.

The previous prime is 6699643. The next prime is 6699703. The reversal of 6699689 is 9869966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6699689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6699689.

It is not an unprimeable number, because it can be changed into a prime (6699619) 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, 108029 + ... + 108090.

It is an arithmetic number, because the mean of its divisors is an integer number (1728960).

Almost surely, 2^6699689 is an apocalyptic number.

It is an amenable number.

6699689 is a deficient number, since it is larger than the sum of its proper divisors (216151).

6699689 is a wasteful number, since it uses less digits than its factorization.

6699689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216150.

The product of its digits is 1259712, while the sum is 53.

The square root of 6699689 is about 2588.3757455207. The cubic root of 6699689 is about 188.5174461499.

The spelling of 6699689 in words is "six million, six hundred ninety-nine thousand, six hundred eighty-nine".