6906866917 has 2 divisors, whose sum is σ = 6906866918. Its totient is φ = 6906866916.

The previous prime is 6906866899. The next prime is 6906866987. The reversal of 6906866917 is 7196686096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6175759396 + 731107521 = 78586^2 + 27039^2 .

It is a cyclic number.

It is not a de Polignac number, because 6906866917 - 2⁷ = 6906866789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6906866987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3453433458 + 3453433459.

It is an arithmetic number, because the mean of its divisors is an integer number (3453433459).

Almost surely, 2^6906866917 is an apocalyptic number.

It is an amenable number.

6906866917 is a deficient number, since it is larger than the sum of its proper divisors (1).

6906866917 is an equidigital number, since it uses as much as digits as its factorization.

6906866917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The square root of 6906866917 is about 83107.5623334002. The cubic root of 6906866917 is about 1904.4096026834.

The spelling of 6906866917 in words is "six billion, nine hundred six million, eight hundred sixty-six thousand, nine hundred seventeen".