6505779073 has 2 divisors, whose sum is σ = 6505779074. Its totient is φ = 6505779072.

The previous prime is 6505779067. The next prime is 6505779109. The reversal of 6505779073 is 3709775056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5409308304 + 1096470769 = 73548^2 + 33113^2 .

It is a cyclic number.

It is not a de Polignac number, because 6505779073 - 2¹³ = 6505770881 is a prime.

It is a super-2 number, since 2×6505779073² = 84650322693369478658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6505779013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3252889536 + 3252889537.

It is an arithmetic number, because the mean of its divisors is an integer number (3252889537).

Almost surely, 2^6505779073 is an apocalyptic number.

It is an amenable number.

6505779073 is a deficient number, since it is larger than the sum of its proper divisors (1).

6505779073 is an equidigital number, since it uses as much as digits as its factorization.

6505779073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1389150, while the sum is 49.

The square root of 6505779073 is about 80658.4098095171. The cubic root of 6505779073 is about 1866.8085031503.

The spelling of 6505779073 in words is "six billion, five hundred five million, seven hundred seventy-nine thousand, seventy-three".