6691946009 has 8 divisors (see below), whose sum is σ = 7669981248. Its totient is φ = 5719421520.

The previous prime is 6691945951. The next prime is 6691946017. The reversal of 6691946009 is 9006491966.

It is a happy number.

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 6691946009 - 2²⁸ = 6423510553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6691946029) 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, 1375082 + ... + 1379939.

It is an arithmetic number, because the mean of its divisors is an integer number (958747656).

Almost surely, 2^6691946009 is an apocalyptic number.

It is an amenable number.

6691946009 is a deficient number, since it is larger than the sum of its proper divisors (978035239).

6691946009 is a wasteful number, since it uses less digits than its factorization.

6691946009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755375.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 6691946009 is about 81804.3153446076. The cubic root of 6691946009 is about 1884.4479344500.

The spelling of 6691946009 in words is "six billion, six hundred ninety-one million, nine hundred forty-six thousand, nine".