6866640007 has 2 divisors, whose sum is σ = 6866640008. Its totient is φ = 6866640006.

The previous prime is 6866639999. The next prime is 6866640031. The reversal of 6866640007 is 7000466686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6866640007 - 2³ = 6866639999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6866640607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3433320003 + 3433320004.

It is an arithmetic number, because the mean of its divisors is an integer number (3433320004).

Almost surely, 2^6866640007 is an apocalyptic number.

6866640007 is a deficient number, since it is larger than the sum of its proper divisors (1).

6866640007 is an equidigital number, since it uses as much as digits as its factorization.

6866640007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 6866640007 is about 82865.1917695241. The cubic root of 6866640007 is about 1900.7051867134.

The spelling of 6866640007 in words is "six billion, eight hundred sixty-six million, six hundred forty thousand, seven".