6691359667 has 4 divisors (see below), whose sum is σ = 6716234880. Its totient is φ = 6666484456.

The previous prime is 6691359659. The next prime is 6691359673. The reversal of 6691359667 is 7669531966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7669531966 = 2 ⋅3834765983.

It is a cyclic number.

It is not a de Polignac number, because 6691359667 - 2³ = 6691359659 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6691359607) 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, 12437203 + ... + 12437740.

It is an arithmetic number, because the mean of its divisors is an integer number (1679058720).

Almost surely, 2^6691359667 is an apocalyptic number.

6691359667 is a deficient number, since it is larger than the sum of its proper divisors (24875213).

6691359667 is a wasteful number, since it uses less digits than its factorization.

6691359667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24875212.

The product of its digits is 11022480, while the sum is 58.

The square root of 6691359667 is about 81800.7314576098. The cubic root of 6691359667 is about 1884.3928949920.

The spelling of 6691359667 in words is "six billion, six hundred ninety-one million, three hundred fifty-nine thousand, six hundred sixty-seven".