6699990669 has 16 divisors (see below), whose sum is σ = 9267888000. Its totient is φ = 4300261056.

The previous prime is 6699990667. The next prime is 6699990679. The reversal of 6699990669 is 9660999966.

It is not a de Polignac number, because 6699990669 - 2¹ = 6699990667 is a prime.

It is a super-2 number, since 2×6699990669² = 89779749929374135122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699990667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79969 + ... + 140694.

It is an arithmetic number, because the mean of its divisors is an integer number (579243000).

Almost surely, 2^6699990669 is an apocalyptic number.

It is an amenable number.

6699990669 is a deficient number, since it is larger than the sum of its proper divisors (2567897331).

6699990669 is a wasteful number, since it uses less digits than its factorization.

6699990669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221044.

The product of its (nonzero) digits is 76527504, while the sum is 69.

The square root of 6699990669 is about 81853.4707205504. The cubic root of 6699990669 is about 1885.2027558547.

The spelling of 6699990669 in words is "six billion, six hundred ninety-nine million, nine hundred ninety thousand, six hundred sixty-nine".