6887747261 has 8 divisors (see below), whose sum is σ = 7031759040. Its totient is φ = 6744644608.

The previous prime is 6887747231. The next prime is 6887747263. The reversal of 6887747261 is 1627477886.

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 6887747261 - 2⁶ = 6887747197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6887747197 and 6887747206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6887747263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211961 + ... + 242286.

It is an arithmetic number, because the mean of its divisors is an integer number (878969880).

Almost surely, 2^6887747261 is an apocalyptic number.

It is an amenable number.

6887747261 is a deficient number, since it is larger than the sum of its proper divisors (144011779).

6887747261 is a wasteful number, since it uses less digits than its factorization.

6887747261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454563.

The product of its digits is 6322176, while the sum is 56.

The square root of 6887747261 is about 82992.4530364057. The cubic root of 6887747261 is about 1902.6507103106.

The spelling of 6887747261 in words is "six billion, eight hundred eighty-seven million, seven hundred forty-seven thousand, two hundred sixty-one".