6777801573997 has 2 divisors, whose sum is σ = 6777801573998. Its totient is φ = 6777801573996.

The previous prime is 6777801573953. The next prime is 6777801574001. The reversal of 6777801573997 is 7993751087776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5222957173641 + 1554844400356 = 2285379^2 + 1246934^2 .

It is a cyclic number.

It is not a de Polignac number, because 6777801573997 - 2¹⁵ = 6777801541229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6777871573997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3388900786998 + 3388900786999.

It is an arithmetic number, because the mean of its divisors is an integer number (3388900786999).

Almost surely, 2^{6777801573997} is an apocalyptic number.

It is an amenable number.

6777801573997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6777801573997 is an equidigital number, since it uses as much as digits as its factorization.

6777801573997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 980184240, while the sum is 76.

The spelling of 6777801573997 in words is "six trillion, seven hundred seventy-seven billion, eight hundred one million, five hundred seventy-three thousand, nine hundred ninety-seven".