6505667123 has 2 divisors, whose sum is σ = 6505667124. Its totient is φ = 6505667122.

The previous prime is 6505667041. The next prime is 6505667137. The reversal of 6505667123 is 3217665056.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6505667123 - 2¹⁶ = 6505601587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6505667153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3252833561 + 3252833562.

It is an arithmetic number, because the mean of its divisors is an integer number (3252833562).

Almost surely, 2^6505667123 is an apocalyptic number.

6505667123 is a deficient number, since it is larger than the sum of its proper divisors (1).

6505667123 is an equidigital number, since it uses as much as digits as its factorization.

6505667123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 6505667123 is about 80657.7158305391. The cubic root of 6505667123 is about 1866.7977952137.

The spelling of 6505667123 in words is "six billion, five hundred five million, six hundred sixty-seven thousand, one hundred twenty-three".