6774594707581 has 2 divisors, whose sum is σ = 6774594707582. Its totient is φ = 6774594707580.

The previous prime is 6774594707567. The next prime is 6774594707707. The reversal of 6774594707581 is 1857074954776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4821054576100 + 1953540131481 = 2195690^2 + 1397691^2 .

It is a cyclic number.

It is not a de Polignac number, because 6774594707581 - 2²⁹ = 6774057836669 is a prime.

It is a super-2 number, since 2×6774594707581² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6774594707581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6774594707081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3387297353790 + 3387297353791.

It is an arithmetic number, because the mean of its divisors is an integer number (3387297353791).

Almost surely, 2^{6774594707581} is an apocalyptic number.

It is an amenable number.

6774594707581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6774594707581 is an equidigital number, since it uses as much as digits as its factorization.

6774594707581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414892800, while the sum is 70.

The spelling of 6774594707581 in words is "six trillion, seven hundred seventy-four billion, five hundred ninety-four million, seven hundred seven thousand, five hundred eighty-one".