6671209669 has 4 divisors (see below), whose sum is σ = 6671373280. Its totient is φ = 6671046060.

The previous prime is 6671209667. The next prime is 6671209679. The reversal of 6671209669 is 9669021766.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6671209669 - 2¹ = 6671209667 is a prime.

It is a super-2 number, since 2×6671209669² = 89010076895518179122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6671209667) 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, 34054 + ... + 120424.

It is an arithmetic number, because the mean of its divisors is an integer number (1667843320).

Almost surely, 2^6671209669 is an apocalyptic number.

It is an amenable number.

6671209669 is a deficient number, since it is larger than the sum of its proper divisors (163611).

6671209669 is an equidigital number, since it uses as much as digits as its factorization.

6671209669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163610.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 6671209669 is about 81677.4734489259. The cubic root of 6671209669 is about 1882.4994735767.

The spelling of 6671209669 in words is "six billion, six hundred seventy-one million, two hundred nine thousand, six hundred sixty-nine".