6699966699 has 8 divisors (see below), whose sum is σ = 8934414912. Its totient is φ = 4466081480.

The previous prime is 6699966683. The next prime is 6699966703. The reversal of 6699966699 is 9966699966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6699966699 - 2⁴ = 6699966683 is a prime.

6699966699 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6699966699.

It is not an unprimeable number, because it can be changed into a prime (6699966649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112149 + ... + 161174.

It is an arithmetic number, because the mean of its divisors is an integer number (1116801864).

Almost surely, 2^6699966699 is an apocalyptic number.

6699966699 is a deficient number, since it is larger than the sum of its proper divisors (2234448213).

6699966699 is a wasteful number, since it uses less digits than its factorization.

6699966699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281497.

The product of its digits is 459165024, while the sum is 75.

The square root of 6699966699 is about 81853.3243002384. The cubic root of 6699966699 is about 1885.2005076742.

The spelling of 6699966699 in words is "six billion, six hundred ninety-nine million, nine hundred sixty-six thousand, six hundred ninety-nine".