6866506811 has 4 divisors (see below), whose sum is σ = 6927272472. Its totient is φ = 6805741152.

The previous prime is 6866506807. The next prime is 6866506837. The reversal of 6866506811 is 1186056686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6866506811 - 2² = 6866506807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6866506891) 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, 30382661 + ... + 30382886.

It is an arithmetic number, because the mean of its divisors is an integer number (1731818118).

Almost surely, 2^6866506811 is an apocalyptic number.

6866506811 is a deficient number, since it is larger than the sum of its proper divisors (60765661).

6866506811 is a wasteful number, since it uses less digits than its factorization.

6866506811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60765660.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 6866506811 is about 82864.3880747333. The cubic root of 6866506811 is about 1900.6928969586.

The spelling of 6866506811 in words is "six billion, eight hundred sixty-six million, five hundred six thousand, eight hundred eleven".