6699886699 has 4 divisors (see below), whose sum is σ = 7308967320. Its totient is φ = 6090806080.

The previous prime is 6699886691. The next prime is 6699886763. The reversal of 6699886699 is 9966889966.

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

It is a cyclic number.

It is not a de Polignac number, because 6699886699 - 2³ = 6699886691 is a prime.

6699886699 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6699886691) 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, 304540294 + ... + 304540315.

It is an arithmetic number, because the mean of its divisors is an integer number (1827241830).

Almost surely, 2^6699886699 is an apocalyptic number.

6699886699 is a deficient number, since it is larger than the sum of its proper divisors (609080621).

6699886699 is a wasteful number, since it uses less digits than its factorization.

6699886699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609080620.

The product of its digits is 544195584, while the sum is 76.

The square root of 6699886699 is about 81852.8356197878. The cubic root of 6699886699 is about 1885.1930043215.

It can be divided in two parts, 6699 and 886699, that added together give a palindrome (893398).

The spelling of 6699886699 in words is "six billion, six hundred ninety-nine million, eight hundred eighty-six thousand, six hundred ninety-nine".