6866640001 has 4 divisors (see below), whose sum is σ = 7394843092. Its totient is φ = 6338436912.

The previous prime is 6866639999. The next prime is 6866640007. The reversal of 6866640001 is 1000466686.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1517180401 + 5349459600 = 38951^2 + 73140^2 .

It is a cyclic number.

It is not a de Polignac number, because 6866640001 - 2¹ = 6866639999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6866640007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264101526 + ... + 264101551.

It is an arithmetic number, because the mean of its divisors is an integer number (1848710773).

Almost surely, 2^6866640001 is an apocalyptic number.

It is an amenable number.

6866640001 is a deficient number, since it is larger than the sum of its proper divisors (528203091).

6866640001 is a wasteful number, since it uses less digits than its factorization.

6866640001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528203090.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6866640001 is about 82865.1917333207. The cubic root of 6866640001 is about 1900.7051861598.

The spelling of 6866640001 in words is "six billion, eight hundred sixty-six million, six hundred forty thousand, one".